Merge pull request #2 from arago/master

aktualisierung
Aktualisierung rike-main.css
Aktualisierung overlay
New head icons @overview
List arrow @overview
Merge pull request #21 from diejen/master

sync
Merge pull request #22 from p1tz/master

sync
Merge pull request #23 from arago/master

sync
Merge pull request #3 from viteke/master

Abgleich
Label + Checkbox (Hide overlay)
Klassenanpassung @Table Overview
Bug @Overview
Icon Update @Portlet title
Merge pull request #24 from diejen/master

update
Nachzug Leaderboard
Update table classes + icons @task portlet
td class="right" for buttons @all
icon update + table styles @Exceeded date
Table styles @exeeded date
Milestones Update @Excceded Date