Selection modes are typically assigned to the number keys.
These are some updates for more consistency among painting and grease
pencil modes:
- Paint Mask = `M` changed to `1`.
- Vertex Selection = `V` changed to `2`.
- GP: Point Selection = `1`.
- GP: Stroke Selection = `2`.
- GP: Segment Selection = `3`.
Design task: #105298
Ref !108714.
Julien Kaspar
827918c925