Restores larger icons since FA upgrade (without changing .icon-large)
Forgot index.css
Restores larger icons since FA upgrade (without changing .icon-large)

* origin/pr/11322:
  Forgot index.css
  Restores larger icons since FA upgrade (without changing .icon-large)
Removed hard coded "index.php" in manager assets
Removed hard coded "index.php" in relevant PHP files
Rebased