Add data display option to container.

Decide to display data per experimenter/per group.
Remove experimenter from tree if in group display mode.
Fix loading of Project/Dataset in group display mode.
Fix loading of images from datasets.
Load orphaned images in group display mode.
Load screen while in group display mode.
Remove smart folder "Tags used not owned" in group display.
Count and load images (Image Browser) in group display mode.
Search in group display mode.
Add support for refresh in group-display
No longer specify group's id (not required)
No longer specified userID and groupID
Fix NPE when clicking on search result.
Review loading of image in viewer.

No longer specified the user's id, this is not required.
Load all available container when in group display mode.
Add support for group display mode.
Modify the canLinkToParent method.
Fix NPE when browsing Group.
Modify menu to add groups to display.
Read display mode from configuration file.