ALTER TABLE display_preferences ADD COLUMN icon_size INTEGER NOT NULL DEFAULT 18;
ALTER TABLE display_preferences ADD COLUMN toolbar_density TEXT NOT NULL DEFAULT 'normal';
ALTER TABLE display_preferences ADD COLUMN sidebar_item_height INTEGER NOT NULL DEFAULT 29;
ALTER TABLE display_preferences ADD COLUMN reader_max_width INTEGER NOT NULL DEFAULT 0;
ALTER TABLE display_preferences ADD COLUMN composer_width INTEGER NOT NULL DEFAULT 900;
ALTER TABLE display_preferences ADD COLUMN selection_color TEXT NOT NULL DEFAULT '#28352e';
ALTER TABLE display_preferences ADD COLUMN unread_font_weight INTEGER NOT NULL DEFAULT 730;
ALTER TABLE display_preferences ADD COLUMN unread_badge_style TEXT NOT NULL DEFAULT 'dot';
ALTER TABLE display_preferences ADD COLUMN compact_headers INTEGER NOT NULL DEFAULT 0;
ALTER TABLE display_preferences ADD COLUMN show_borders INTEGER NOT NULL DEFAULT 1;
ALTER TABLE display_preferences ADD COLUMN scrollbar_density TEXT NOT NULL DEFAULT 'thin';
ALTER TABLE display_preferences ADD COLUMN monochrome INTEGER NOT NULL DEFAULT 0;
ALTER TABLE display_preferences ADD COLUMN folder_background TEXT NOT NULL DEFAULT '';
ALTER TABLE display_preferences ADD COLUMN message_background TEXT NOT NULL DEFAULT '';
ALTER TABLE display_preferences ADD COLUMN reader_background TEXT NOT NULL DEFAULT '';