Unified clipboard action labels
Allow stacking of transactions

Closes #1166
Improved action methods
Fixed display of error messages
Add optimizations for mobile devices (WIP)
Merge branch 'master' of github.com:WoltLab/WCF
Add optimizations for mobile devices (WIP)
Add optimizations for mobile devices (WIP)
Fix typos in CONTRIBUTING.md
Add optimizations for mobile devices (WIP)
Update MySQLDatabaseEditor.class.php

``$tables`` isn't a class member.
Merge pull request #1177 from Kiv4h/patch-6

Update MySQLDatabaseEditor.class.php
Merge branch 'master' of github.com:WoltLab/WCF
Merge remote-tracking branch 'upstream/master'
Fixed Link Building with identic Controllers