Configuration:
- Add push button to select custom stamp image
- Check if loaded image is usable as stamp or throw error
- Keep image proportions in previewer
- Move previewer below the combobox to display larger preview
Annotation tool:
- Keep stamp image proportion in annotation preview (while left mouse button is down)
- Adding the annotation with one-click (without holding the left mouse button and dragging) adds the stamp with original proportions
BUG: 370381
BUG: 383652
Closes T8074
TODO:
- [ ] Check if filters in file chooser make sense / propose better alternative
- [x] Update doc ( @yurchor will do it after we merge this)