refactored collection component
fixed event issue
Merge pull request #90 from sulu-cmf/bugfix/js-memory-leak-hunting

[BUGFIX] refactored collection component
updated overlay options
solved merge conflicta
Merge pull request #94 from sulu-cmf/bugfix/overlay-memory-leak

Bugfix/overlay memory leak
fix #96 normalize segmentation folder length
changed minimum stability
Merge branch 'enhancement/96' into develop
Merge branch 'develop' into bugfix/cannot-delete-media-with-tags