GUI: improve storing of config values
GUI: fix warnings
GUI: improve storing of config values (2)
GUI: eliminate StringInfo class
GUI: improve comparing of objects
GUI: improve storing of config values (3)
GUI: update junit tests
GUI: fix equals methods
GUI: fix unit handling
GUI: fix editable combo boxes
GUI: fix parsing of the RA action units
GUI: fix operation default value checking
GUI: disable "apply grp" button if there are not services

bug introduced in 1.5.14
GUI: fix units in CRM view
GUI: fix drbd view
GUI: fix drbd view units
junit: add level 0 unit tests
GUI: fix VM view
GUI: fix operation "same as" combo box
GUI: fix colocation npe