Do not delete/move/rename original files on integration

[darealshinji]

Pre-submit checks

• [X] I checked for similar issues beforehand, but could not find any. I could not add my proposal to any existing issue.
• [X] I am going to take the time to to fill in all the required details. I know that the bug report will be dismissed otherwise.

Feature description

Please keep the original AppImage file where it is when integrating it.

Proposed solution

Just copy the file instead of moving it.

Alternative solutions you considered

No response

Additional context

I can't really think of a packaging or app bundle system that does it this way. The users aren't even asked if they want to keep the file or not.