bugfixes
Merge pull request #794 from jidel/issue#790-help_css

bugfixes
Changed structure of hmtl document
Fix NPE
Added cancel button to categories and school year tables
Merge pull request #796 from jidel/issue#795-review_help

Changed structure of hmtl documents
Merge pull request #797 from jidel/issue#773_abort-button

Issue#773 abort button
Merge pull request #799 from HumBuch/develop

release version 1.1.19