-Sidebar und Content-Positionierung
-Border für Abgrenzung Sidebar und Content
Merge remote-tracking branch 'origin/development' into development

Conflicts:
	app/webroot/css/application.css
Merge branch 'development' of C:\xampp\htdocs\swe-project with conflicts.
-Borderanpasssungen
-Positionierung von Buttons und Eingabefeldern
Merge remote-tracking branch 'origin/development' into development