Add default output file name to output setting

[wlin98004]

I found it very tedious to provide an output file name for each of the bursted region. It will be nice to have a "Default Output Filename" in the Region Defaults. User can choose different options. Here is what I am thinking.

The "e.g." will change as user choose different options. Not sure if we can check to see if there is duplicated name in the output folder already. We can either warn the user via the conflict process. Or we can auto increment the counter to avoid conflicts.

[jadrake75]

I could definitely see the value here. This would be an interesting feature to build and not too difficult to implement. NOTE: I think you need another radial button option "blank" (this is what I would use). Ie. I take a scanned image like "Image003.jpg" and I enter numbers by catalogue number. So first stamp might be 27 then B23 for the second one etc. However if you were just bursting images and didn't care yeah I could see a lot of value here.