Closing xed while a large file is loading does not terminate xed

[syildizz]

 * Xed version 3.4.5
 * Distribution - Mint 21.3

Issue

When a large file is loaded a loading bar appears. If xed is closed when the loading bar is still ongoing, xed does not stop running and instead continues to use the CPU.

Steps to reproduce

1. Click on a large file.
2. Wait to see the loading bar at the top showing "Loading <file> from <folder>".
3. Close xed before the file is able to load.
4. Open system monitor and check CPU usage.

Expected behaviour

Xed should terminate when it is closed.

Other information