Fixes replacement of table prefixes

If a package, that is no application, requires an application (in WCF 1, this would have been a plugin), only the `wcf1_` prefix is replaced, thus altering existing application tables or creating new application tables isn't possible.

This commit now replaces app1_ with app{WCF_N}_ for all installed applications.
Update option.tpl

Added two new template events
Colorpicker improvement
Small optimization
Updates JavaScript for checking/unchecking checkboxes
Fixed links in RSS feeds
Merge branch 'master' of github.com:WoltLab/WCF
Fixed style editor issue
Guaranteeing unique hash in StringStack

Fixes #1260
Merge branch 'master' of github.com:WoltLab/WCF
Resolves todo: Replaces include CSS code with CSS class
Merge branch 'master' of github.com:WoltLab/WCF
Added ACP login redirect
Merge branch 'master' of github.com:WoltLab/WCF
Fix typo in de.xml
Small optimization

Closes #1268
Merge branch 'master' of github.com:WoltLab/WCF
Fixed webkit issue
Fixed style import

Fixes #1266
Added template event