Changelog.
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Add `Image Size`.
Fix ImageExpand/Hover's error handling xhring the wrong URL.
Move .catalog-mode to doc.
Toggle index size classes when switching index mode too.
Add keybind to cycle through index sort types.
Close #1439.
Fix catalog selector.
Add hotkeys for index modes.
Remove unneeded parentheses, change default keybindings, remove unneeded slice and filter.
Change ordering to be the same as the dropdown.
Added line in the changelog.
Simplify QR's file/submit html and css.
Move the <time> in #nav-links, lose the brackets.
Simplify setting's section html and css.
Simplify QR's dump list html and css.
Optimize setting data operations.

Setting local data on Chrome is not throttled, only debounce sync.
Don't make DBs save data on every page load, don't save cleaning operations if nothing's changed.
Debounce Unread.saveLastReadPost() on Chrome to every 5 seconds.
Keep the title in 404'd tabs.
Add `Open threads in a new tab` setting.