[ticket/10472] Fix ACP overflow:hidden problem for medium-sized screens

PHPBB3-10472
[ticket/10472] More clearing and white-space fixes

PHPBB3-10472
[ticket/10472] Fix weird padding on input type=number

PHPBB3-10472
[ticket/10472] Remove dd selector and use -moz-padding-end

PHPBB3-10472
Merge remote-tracking branch 'PayBas/ticket/10472' into develop-ascraeus

* PayBas/ticket/10472:
  [ticket/10472] Remove dd selector and use -moz-padding-end
  [ticket/10472] Fix weird padding on input type=number
  [ticket/10472] More clearing and white-space fixes
  [ticket/10472] Fix ACP overflow:hidden problem for medium-sized screens