diff --git a/src/web/index.html b/src/web/index.html
index 40e0ebf..1bd47a7 100644
--- a/src/web/index.html
+++ b/src/web/index.html
@@ -43,7 +43,6 @@
         <div id="login-error" class="form-error hidden" role="alert"></div>
         <button class="button primary wide" type="submit">Sign in</button>
       </form>
-      <footer>RustBox</footer>
     </div>
   </section>
 
@@ -1214,7 +1213,8 @@
               <div class="settings-panel-heading account-session-heading">
                 <div>
                   <h3>Notifications from accounts</h3>
-                  <p class="muted">Choose which signed-in accounts can show combined new-mail notifications in this browser.</p>
+                  <p class="muted">Choose which signed-in accounts can show combined new-mail notifications in this
+                    browser.</p>
                 </div>
               </div>
               <div id="account-notification-list" class="account-settings-list"></div>
@@ -1299,7 +1299,8 @@
                       <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-link"></use>
                     </svg></button><button type="button" id="identity-signature-image-btn" title="Import image"><svg>
                       <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-image"></use>
-                    </svg></button><button type="button" id="identity-signature-html-btn" title="Paste or edit HTML source"><svg>
+                    </svg></button><button type="button" id="identity-signature-html-btn"
+                    title="Paste or edit HTML source"><svg>
                       <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-file-text"></use>
                     </svg></button><button type="button" data-signature-command="removeFormat"
                     title="Clear formatting"><svg>
@@ -1363,27 +1364,41 @@
           </svg></button></header>
       <div class="signature-html-body">
         <section class="signature-html-source-pane">
-          <div class="section-heading"><span>HTML source</span><button id="identity-signature-html-preview" type="button"
-              class="button quiet small">Refresh preview</button></div>
+          <div class="section-heading"><span>HTML source</span><button id="identity-signature-html-preview"
+              type="button" class="button quiet small">Refresh preview</button></div>
           <textarea id="identity-signature-html-source" spellcheck="false"
             placeholder="Paste a complete HTML signature or an HTML fragment here"></textarea>
           <small class="muted">Scripts, forms and unsafe attributes are removed before the signature is used.</small>
         </section>
         <section class="signature-html-preview-pane">
-          <div class="section-heading"><span>Visual editor</span><span class="muted">You can add images and adjust the rendered signature.</span></div>
+          <div class="section-heading"><span>Visual editor</span><span class="muted">You can add images and adjust the
+              rendered signature.</span></div>
           <div class="signature-editor-shell signature-html-preview-shell">
             <div class="signature-editor-toolbar" aria-label="HTML signature formatting">
-              <button type="button" data-signature-html-command="bold" title="Bold"><svg><use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-bold"></use></svg></button>
-              <button type="button" data-signature-html-command="italic" title="Italic"><svg><use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-italic"></use></svg></button>
-              <button type="button" data-signature-html-command="underline" title="Underline"><svg><use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-underline"></use></svg></button>
-              <button type="button" id="identity-signature-html-link" title="Insert link"><svg><use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-link"></use></svg></button>
-              <button type="button" id="identity-signature-html-image-btn" title="Import image"><svg><use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-image"></use></svg></button>
-              <button type="button" data-signature-html-command="removeFormat" title="Clear formatting"><svg><use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-remove-format"></use></svg></button>
+              <button type="button" data-signature-html-command="bold" title="Bold"><svg>
+                  <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-bold"></use>
+                </svg></button>
+              <button type="button" data-signature-html-command="italic" title="Italic"><svg>
+                  <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-italic"></use>
+                </svg></button>
+              <button type="button" data-signature-html-command="underline" title="Underline"><svg>
+                  <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-underline"></use>
+                </svg></button>
+              <button type="button" id="identity-signature-html-link" title="Insert link"><svg>
+                  <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-link"></use>
+                </svg></button>
+              <button type="button" id="identity-signature-html-image-btn" title="Import image"><svg>
+                  <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-image"></use>
+                </svg></button>
+              <button type="button" data-signature-html-command="removeFormat" title="Clear formatting"><svg>
+                  <use href="__RUSTBOX_ASSET_PREFIX__/assets/icons.svg#icon-remove-format"></use>
+                </svg></button>
             </div>
             <div id="identity-signature-html-preview-editor" class="signature-editor signature-html-preview-editor"
               contenteditable="true" role="textbox" aria-multiline="true" aria-label="Rendered HTML signature"></div>
           </div>
-          <input id="identity-signature-html-image" type="file" accept="image/png,image/jpeg,image/gif,image/webp" hidden>
+          <input id="identity-signature-html-image" type="file" accept="image/png,image/jpeg,image/gif,image/webp"
+            hidden>
         </section>
       </div>
       <footer class="dialog-actions"><button type="button" class="button quiet close-dialog">Cancel</button><button