Resolves issue #51293: Extend Extbase class until issue #47192 is fixed in core (related issue #49077)

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/sr_language_menu/trunk@81740 735d13b6-9817-0410-8766-e36946ffe9aa
Resolves issue #50963: Filter grayscale not working in IE10

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/sr_language_menu/trunk@81741 735d13b6-9817-0410-8766-e36946ffe9aa