Web bugs 18th dec

Small fixes. To test:

 - Admins, when editing users, should not be able remove 'system' group from their list of groups. Now, the 'Administrator' checkbox is the only way to remove 'system' group. This means that when you are editing  your OWN profile, you cannot remove your own admin status (by mistake) since the Administrator checkbox is disabled.

 - Get a landing page to a well (select well or wells and use the link icon) and paste url into browser. Then select a different item in the tree and re-select the previously selected Plate/Acquisition. Previous bug caused the well(s) specified above to be re-selected automatically (instead of simply selecting the Plate/Acquisition, which is what should happen now). 

 - Fix tooltip remaining on Batch remove annotations when Tag / File removed. See ticket 9940 for details