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
Simplify usage of unbound i18n helper
Modifies JSHint config to enable new Ember e2e tests syntax
refactors Discourse.SearchController
Topic list dates formatting changes: use Dec '12 and Jan 21
Don't need to show date in smaller font when MMM Y format
PERF: optimise featuring of topics and users

Previously this would delete all features and recreate, causing
uneeded network traffic and db pain
FEATURE: new scheduler so we can deprecate sidetiq

This is a work in progress, should have it finished tomorrow.
better help for category names, prefer 1 word
Fixed 'devloper' typo in quickstart config file
Toggle button for bulk selection of topics
Modal for performing a bulk operation
Front end code is complete for changing categories of topics in bulk
Delegate bulk operations to a `TopicsBulkAction` object.
Server side implementation for bulk editing categories
Merge pull request #1885 from schmatz/master

Fixed 'devloper' typo in quickstart config file
Bulk close operation
Merge pull request #1884 from velesin/search_controller_refactoring

refactors Discourse.SearchController
Merge pull request #1883 from velesin/ember_integration_tests_jshint_fix

Modifies JSHint config to enable new Ember e2e tests syntax