use ABSOLUTE_URI_STUDIP as URL for core plugins and move assets, re #796

lib/classes/ModulesNotification.class.php

public/assets/images/anfasser_48.png

public/plugins_packages/core/Blubber/Blubber.class.php

public/plugins_packages/core/Forum/CoreForum.class.php

...gins_packages/core/Forum/controllers/forum_controller.php

public/plugins_packages/core/Forum/img/accept.png

public/plugins_packages/core/Forum/img/anfasser_24.png

public/plugins_packages/core/Forum/img/community.png

public/plugins_packages/core/Forum/img/corners_left.png

public/plugins_packages/core/Forum/img/corners_left_red.png

public/plugins_packages/core/Forum/img/corners_right.png

public/plugins_packages/core/Forum/img/corners_right_red.png

public/plugins_packages/core/Forum/img/decline.png

public/plugins_packages/core/Forum/img/move.png

public/plugins_packages/core/Forum/views/area/add.php

public/plugins_packages/core/Forum/views/index/_post.php

resources/assets/javascripts/init.js

resources/assets/javascripts/lib/forum.js

resources/assets/stylesheets/scss/forum.scss

resources/assets/stylesheets/studip.scss