Added 'search by image id' to search panel
Wrapped actionPerformed into an Action object
En-/Disable other search options if ID search optin is (un-)checked
Reverted 'Wrapped actionPerformed into an Action object' again
Added 'All groups' search option
Changed search error message
Just fixed some spacing issues
Improved documentation, removed superfluous method.
Made use of ArrayUtils.EMPTY_STRING_ARRAY
Made use of ArrayUtils.EMPTY_STRING_ARRAY
Merge pull request #2506 from dominikl/rebased/develop/search_by_image_id

Search by Image ID (rebased onto develop)