“Can create groups” and “Can create teams” had hardcoded defaults to
`true`. Sometimes it is desirable to prohibit these for newly created
users by default.

Cannot remove user that owns a project.

Make lines shorter, set alert, use path instead of url.

This reverts commit 927d0cc2.

Handles stuff that's shared across admin controllers.

Didn't bother with files in db/, config/, or features/

  * Remove trailing whitespace
  * Converts hard-tabs into two-space soft-tabs
  * Remove consecutive blank lines