Sometimes controls don't activate on mouse clicks

This is really tricky to reproduce and I have not yet found a reliable way of reproducing it with the debugger.

1. Run demo.c in cmd.exe or ConEmu on Windows (any terminal that supports mouse).
2. Click on any control (e.g. a top-level MenuBarItem or one of the radio buttons.
3. Click on another control.
4. Then another …
5. Eventually you’ll notice one of your clicks does nothing; the target control does not get focus as expected. Clicking again will work.
6. You’ll think you’re crazy and you just either didn’t hit the mouse button hard enough or missed the hit-target. But you didn’t.
7. You’ll try again and find you can’t precisely reproduce it the same way.

P.S. I thought I had introduced this bug in my upcoming MenuBar PR and was actually quite happy to find it also exists in the current master and that it exists across all controls.

[tig]

I think it is fixed. It was hard to reproduce before, and I’ve been trying since @bdisp made his latest changes that fixed some window dragging issues…I think they were the root cause.

Note that mouse is still broken in Windows Terminal. This is for all GUI apps, and is not specific to Terminal.Gui.

[BDisp]

But it is only working on Windows 10. Still working on Curses.