Visual cues for incompatibility reasons

[HebaruSan]

Motivation

We continue to get questions about why a mod is shown as incompatible when the user expects it to be compatible. The answer is that there is a conflict or an unsatisfied dependency, but this is generally not obvious.

Changes

Now if a mod is incompatible because of the KSP versions, <!> is added to its Versions tab, which shows the range of compatible versions:

And if a mod is incompatible because of a conflict or an unsatisfied dependency, <!> is added to its Relationships tab, which shows those relationships:

Ideally these would have been big red stop sign icons instead, but Mono's TabControl does not display icons (it makes room for them if you set TabPage.ImageIndex or TabPage.ImageKey, but they're never drawn 🙄).

Priorities in choosing these characters:

• They should be wide enough to get attention but not too wide (I found parentheses and square brackets too narrow)
• They should imply an alert or attention condition (hence exclamation mark)
• They should have a slight visual resemblance to a stop sign (angle brackets almost form a hexagon, which is almost an octagon)
• They should not crash Mono (as 🛑 does)

[DasSkelett]

What do you think about opening the relevant tab as well? Should increase the chance to draw the user's attention, might be a bit disruptive, though.

[HebaruSan]

I thought of that but wasn't sure about it. I'm open to it if you think it's a good idea, though.

[DasSkelett]

Hm, I am not fully confident either. In that case, let's leave it out for now, and try whether the angle brackets that almost form a hexagon, which is almost an octagon already suffice to help users find out what's up.

[DasSkelett]

Works as advertised!