TUI: Navigation and exiting in dialogs broken

[ch1bo]

Context & versions

Likely since the rewrite to brick 1.10
b6f5028

Steps to reproduce

1. Start the TUI
2. Try exit it with Ctrl+C
3. Open a head to get access to some dialogs
4. Try navigate a dialog (form) with up/down arrows

Actual behavior

• Exiting the TUI via Ctrl+C is not working
• Navigation in dialogs only works with and arrow keys don't work

Expected behavior

All key bindings to work

Hypothesis

The TUI has been rewritten with brick 1.10. The monadic event handling via EventM was expected to short-circuit when doing a halt. However EventM is just a state transformer around IO and has no early exiting. That means, if we continue handling events after doing a halt in a global event handler.. the TUI main loop does not exit.

Something different is fishy with delegating event handling to forms.

It seems like composing event handlers should be done differently.