Comment Editing, Keyboard Navigation, and File Move Reliability Fixes

Comment editing now opens with your original text. Clicking Edit on a comment previously opened an empty box instead of showing what you'd written.
Keyboard navigation in list view no longer goes dead after a click. Arrow keys, Home/End, and type-ahead search now keep working on a row right after you click it.
File moves between General and subrequests are clearer and safer. The "Move to…" picker now only appears when there's an actual valid destination — no more opening a list where nothing can be selected. Undo (including ⌘Z/Ctrl+Z) now only works while its confirmation message is still visible, so it can't accidentally undo an older move.
New Task's Category and Assignee selectors no longer disappear while the rest of the page is still loading.
Closing a menu inside a dialog no longer leaves the page unresponsive to clicks.
Large "Add subrequests from a table…" imports no longer time out partway through for bigger pasted tables.
CoAudit's automation history no longer shows a bogus "Run sample" entry for steps that don't actually run anything.
Uploading files from the board's quick-upload panel in CoAudit no longer shows a false error — files that had actually uploaded successfully previously displayed a confusing "issue" message.
Notifications are more resilient to brief hiccups loading your unread count, instead of dropping your live connection.