Implement context menu for quickly switching to other styles

[rugk]

Background

I need to quickly switch styles to another one than the two between I can toggle.
However, I also want to keep the fast access to these two toggles, so I want no popup to open on click.

Proposed solution

Implement context menu for quickly switching to other styles when you right-click on the button.

Alternatives

• Popup, for the reasons stated above I would not like that. Also it is harder to implement.

Additional context

With v2.0 users can now switch between to browser-style/system-style, too.