Correct bug in 054957669e0 with Ajax column loading.
Internal: Make paperTags easier to use.

From John Douceur.
Sexier drag and drop.

Show a bubble with the paper number and title hint.
Named field improvments.

- Review-form-sensitive abbreviations like "show:ovemer" work (as
  opposed to "show:overAllMerit", the database name). The database
  names work too. Which took some doing.
- "hide:ovemer" works.
- "edit:revpref" works.
Sort ignores 'edit' at the beginning of field names.

So 'sort:tag:~foo' shows sort UI even if field is 'edittag:~foo'.
Tweak to drag-and-drop for ranges of identical ranks.
The canonical name for score fields is the database field name.

That's better if people change the name of the field, so the
abbreviation stops working.
Compact columns nit.
Merge remote-tracking branch 'github-kohler/master' into rankmerge
fixed bug in compare keyword