Addresses two improvements to `Snap to Grid` as suggested in #73993:
- Make 'Absolute Grid Snapping' a new Snap Mode
- Snap to Grid in Non-Side View performed at ground level
Implementation details:
- Snap to Grid has no cursor symbol, unless we are in `Set Snap Base`
mode. Similar to the previous 'Absolute Grid Snap' behavior.
- In Non-Side view, Snap to Grid is performed at ground level.
- If `Snap Base` is `Closest`, Snap to Grid uses the transform pivot
point instead. Similar to the previous 'Absolute Grid Snap' behavior.
- The "Absolute Grid Snap" option has been removed.
Pull Request: https://projects.blender.org/blender/blender/pulls/116109
f0479e915f