Remove "overwriting disabled" warning/error from export completion box / show it only if same file already exist

[slrslr]

The fewer issues I have to read, the more new features I will have time to implement, so I ask that you please try these things first

• Check out all the menus and keyboard shortcuts. Maybe the feature already exists?
• Try with the newest version from GitHub
• Read the documentation and FAQ, Known issues, Troubleshooting to see if the feature already exists
• See if someone already suggested this under Issues or Discussions

Description

ISSUE:
When file overwriting is disabled on the export options dialog, then the export completion dialog always catches user attention with a warning that export may not work, in case same file/s already exist.

SOLUTION:
It would be better if the warning (or error) only appear if there actually was a file/s which prevented new file saving (maybe even mentioned which file/segment). It would save user time constantly reading a warning which may/may-not apply on his export.

If it is not possible to adjust export completion box like this, maybe the warning should be removed and new popup prompt added asking if user wishes to overwrite file XY (the popup would only show if user has disabled overwriting).

[overwrite] [rename] [cancel]

I guess that you have been already thinking about way to create new files like:
filename.0001.mp4 (if "filename.mp4" already exist)

similar:
#2054 (Prevent overwriting files)