Update example

[gavr123456789]

1. update depentency to 0.9
2. dont use glade generated ui file, its incompleteble with gtk 4
3. not sure, but pressing ctrl in app makes it crash, also open file + start writing anything inside also crash

Peek.2021-06-01.18-57.mp4

[romgrk]

Thanks, will try to find some time to update the example.