Process split button items AND the item itself.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1342 3c3d7b80-5828-415e-9f61-280b98178fff
Code cleanup.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1343 3c3d7b80-5828-415e-9f61-280b98178fff
Fix bug and update documentation.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1344 3c3d7b80-5828-415e-9f61-280b98178fff