Fix for node view in discovering state with nil method exceptions
Moved show all/allocated button to the top to avoid confusion on the available actions. It's the same as for http://crowbar:3000/network/switch?node=crowbar now
Merge pull request #834 from tboerger/feature/bulk-edit-buttons

Moved show all/allocated button to the top...
Merge pull request #836 from tboerger/feature/fix-discovering-state

Fix for node view in discovering state with nil method exceptions