Refactor browser language auto-detection.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1491 3c3d7b80-5828-415e-9f61-280b98178fff
Improve the OMVFilesystem::getMountPoint and OMVFilesystem::isMounted methods.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1492 3c3d7b80-5828-415e-9f61-280b98178fff