Mantis 0001169: Empty progress text output in Windows IE.

git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1550 3c3d7b80-5828-415e-9f61-280b98178fff
Improve performance of OMVFilesystems::getBackend method. This is not the correct implementation, but has more performance.

git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1551 3c3d7b80-5828-415e-9f61-280b98178fff