Make small/large cardinal direction a radio button

[WeirdRubberDuck]

Minimal change to use radial buttons rather than checkboxes. The code should probably be looked over again as part of refactoring the layouting of this panel (OpenSpace/OpenSpace#3753)

Closes OpenSpace/OpenSpace#3754

The behavior is still a little weird/unpredictable, as switching the radio buttons also disables the "Marks" checkbox if enabled

2026-03-17.11-45-36.mov

[alexanderbock]

Why do the marks get disabled? If it is because its a radio button now, many the marks could stay a checkbox?

[WeirdRubberDuck]

Why do the marks get disabled? If it is because its a radio button now, many the marks could stay a checkbox?

The behavior is unchanged from before. The issue is that there are four different textures - one with large/small letters and with/without lines each. The texture used dictates which radio buttons and checkboxes are enabled, and when clicking one of the radio buttons the texture without lines/marks are enabled.

I guess I could possibly update this here as well, but keeping a state for the marks checkbox and more explicitly control which precise texture is applied 🤔

[WeirdRubberDuck]

Merging this and leaving any future updates to OpenSpace/OpenSpace#3753