Add a "Settings" button to the appimage launch UI

[iTrooz]

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

I never realized that AppImageLauncher add a Settings UI until very recently. This caused me to uninstall AppImageLauncher a few time because a default setting was annoying for me and I didn't know how to change it

Proposed solution

I propose to hightlight the settings UI by adding a button in the appimage launch UI, to make users more aware of the settings

Alternative solutions you considered

No response

Additional context

I'm ready to submit a PR for this, if you give me your approval

[TheAssassin]

I'm not entirely sure where to place such a button. It's an edge case feature... But please go ahead and open a PR with a proposal.