[ticket/11977] Use CSS instead of JS to disable up/down icons

PHPBB3-11977
[ticket/11977] Remove data and change code in acp_modules

PHPBB3-11977
Merge remote-tracking branch 'cyberalien/ticket/11977' into develop

* cyberalien/ticket/11977:
  [ticket/11977] Remove data and change code in acp_modules
  [ticket/11977] Use CSS instead of JS to disable up/down icons