Migrate to GTK4

[feliwir]

Hey,

i'm trying to get a bit into Rust & GTK4 development (disclaimer: i read your tutorial series). I thought it would be a good starting to point to test something existing like the fontfinder. However i guess there are some blockers for this? Namely the gtkwebview library comes to mind.

[mmstick]

If done, it should be using the new-aproach branch of the relm4 crate.

[feliwir]

Okay - i will look into relm4 (fortunately there seems to be a book aswell). Do you have any ideas/opinions about the webview problem? Could we maybe render the fonts without a webview?