updated for version 7.3.1229
Problem:    Python: not so easy to delete/restore translating.
Solution:   Make macros do translation of exception messages. (ZyX)
	    Note: this breaks translations!
Added tag v7-3-1229 for changeset b6e693e1f946
updated for version 7.3.1230
Problem:    Python: Exception messages are not clear.
Solution:   Make exception messages more verbose. (ZyX)
Added tag v7-3-1230 for changeset f5c822e5a0eb