Fix group matching SQL query

The check there is intended for the :members_mods_and_admins level, which is not automatically checked for normal users. Instead, the :everyone level is the one used, which would always fulfill the "alias_level in :levels" check.

This changes the :everyone level to :members_mods_and_admins, which was originally intended.
Change to case-insensitive matching in group @name matching
FIX: Don't allow moving a category with children underneath another
category (creating grandchildren)
Show group icon in category badges if the category has restricted access
Don't list subcategories when creating a new category.
Add group icon to category badges in composer and edit topic title
Remove keyboard shortcuts link from site map menu
BUGFIX: JS errors could crash our process
therubyracer now ships with my timeout fix, no need for a forked gem
BUGFIX: emails sent from "2 replies" as opposed to correct user
minor style fix
use consistent style
adding basic :focus style back in - some tweaks still needed, but this makes tabbing through content functional
FEATURE: added welcome to discourse topic
BUGFIX: anon had skewed column titles
Merge pull request #1895 from awesomerobot/master

adding basic :focus style back in
BUGFIX: deleted categories would mess up watching/tracking prefs
Removing outdated instructions.
You must give a reason for suspending a user
fixing :focus style