Pop-up with error/alert information

[guillecro]

So my area of recording was outside the screen size.
After opening peek on the terminal I saw what was the error. But it would be nice to have maybe a pop-up giving me the same message without using the terminal

[x11grab @ 0x562632890c60] Capture area 503x691 at position 869.71 outside the screen size 1366x768
:0+869,71: Invalid argument

[phw]

I am not a huge fan of error popups, but this surely needs some better handling, yes.

[phw]

I added a dialog for showing error details. But not 100% finished, the displayed errors are rather basic for now. I keep this open as I want to show actual error output in case of commands called.