After updating to tview 0.42.0, I also sadly noticed, that the tview.Modal now clears the background and doesn’t simply draw over the already present widget. So, I decided to write my own Dialog widget. This endeavor lead me down the path to actually bring back a custom Button implementation, too. When the button is focused, it surrounds the button text with [ and ]. When not in focus, the brackets are removed. Much better than before (https://twtxt.net/conv/qx3vz4a):

https://lyse.isobeef.org/tmp/tt-confirm-message-removal-with-custom-dialog.png

I also use the same buttons in the compose view, too.