+[8.50b1x32] Chained commands replace themselves

[fenix_productions]

If Command field is set its content is replaced when new cm_ is chosen even if there is comma in it.

Steps to reproduce:
1. click on buttons bar and chose Change
2. select some command (i.e. cm_SrcThumbs)
3. put comma after first command,
4. click on magnifying glass and choose another command (cm_100Percent)

Result:
Whole Command field is filled in with new command.

Expected result:
If there is comma separator in this field it should not get replaced. New command can be added at the end of existing one.

Nice improvement:
More cm_XXPercentage values.

[ghisler(Author)]

This isn't really a bug, but it would be a nice addition, so I will try to add it.

[fenix_productions]

8.50b2x32
Appending seems to work nicely.

Thank you for this addition.