Fix edit issue dialog data diaplay/save.
Fix edit issue dialog data diaplay/save.

Until now, the edit issue dialog got the raw data found in the
database and displayed it as a string without applying an
appropriate convert step. Now we use adequate convert/deconvert
steps by displaying and saving.

akosthekiss/fuzzinator,renatahodovan/fuzzinator,akosthekiss/fuzzinator,renatahodovan/fuzzinator,akosthekiss/fuzzinator,renatahodovan/fuzzinator,akosthekiss/fuzzinator,renatahodovan/fuzzinator