[ticket/102] Cover moving modules more and fix functional tests

B3P-102
[ticket/102] Rename acp_portal.js to acp_editor.js

B3P-102
[ticket/102] Use phpbb.toggleDisplay() instead of dE()

B3P-102
[ticket/102] Add possibility to move module up via ajax

B3P-102
[ticket/102] Ajaxify moving modules up and down

The complete moving process for moving a module up or down now works with
AJAX. Images are properly changing as one would expect.

B3P-102
[ticket/102] Add admin CSS file for portal

B3P-102
[ticket/102] Fix html validation issues in modules overview

B3P-102
[ticket/102] Add functional tests for deleting module and fix deleting module

B3P-102
[ticket/102] Use B3P_U_ACTION instead of U_ACTION

U_ACTION couldn't be changed for some reason. Therefore we are now using our
own template variable.

B3P-102
[ticket/102] Make Welcome module settings html valid

B3P-102
[ticket/102] Fix menu module acp settings

B3P-102
[ticket/102] Add git-tools with commit and pre commit hooks

B3P-102
[ticket/102] Ignore git-tools on export

B3P-102
[ticket/102] Ajaxify deleting module from acp

B3P-102
Merge pull request #238 from marc1706/ticket/102

[ticket/102] Ajaxify certain actions in the ACP