Convert admin section controllers to ES6 modules
ES6: Patch up a few issues with the admin controllers conversion
FIX: Don't capitalize category names in the breadcrumbs. See:

https://meta.discourse.org/t/categories-dropdown-inconsistent-text-formatting/18042
Move FAQ, Terms of Service, and Privacy Policy into topics in the Staff category. First post of those topics will be rendered on their respective pages. Site settings and content are not used for these documents anymore. Translations of the default text is moved into the standard YML files.
FIX: Allow buttons to be hidden. Fixes persistent uploading progress on
file uploads for non-admins.
FIX: too_few_topics_notice check and message should use basic_requires_read_posts site setting
REFACTOR: Move Markdown tests to Javascript land
FIX: You couldn't span multiple lines with bold or italics
Extra test for spanning italics
Merge pull request #2586 from riking/another-test

Extra test for spanning italics
Use settingName in settings_list like the others
Merge pull request #2587 from riking/underscores

Use settingName in settings_list like the others
FIX: There was an error renaming the Uncategorized topic
FIX: don't show the option to notify yourself in the flag dialog
FIX: Home logo wasn't scrolling to top if on second page of topic
results.
FIX: No, for real don't show Uploading... for non-admin users when they
aren't uploading.
do not allow password changes if local logins disabled
Merge pull request #2588 from shivpkumar/shiv/change-password

Do not allow a user to change their password if local logins are disabled
reverting notification style
Merge pull request #2589 from awesomerobot/master

reverting notification style