only minor code styling

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/slub_events/trunk@80099 735d13b6-9817-0410-8766-e36946ffe9aa
backend: don't warn if multiple categories are choosen; show only categories of current pid

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/slub_events/trunk@80100 735d13b6-9817-0410-8766-e36946ffe9aa
backend-module: don't hide categories if none is selected

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/slub_events/trunk@80101 735d13b6-9817-0410-8766-e36946ffe9aa
add min and max to html5 input field with type number

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/slub_events/trunk@80108 735d13b6-9817-0410-8766-e36946ffe9aa