Add an X button to clear the current image in the UI

[radonmiser]

Is your feature request related to a problem? Please describe.
It takes multiple step to clear the image in the UI if it's unwanted. User need to either
1.restart the program
2.deleted the unwanted image after it's in the anki note.

Describe the solution you'd like
A button to clear the current image.

Additional context
Add any other context or screenshots about the feature request here.

[Mycheze]

I agree there should be an X button, but for now, you can use the shortcut Ctrl + W.