Hello!
0. Set display grid to 100 mil
1. Set snapping to 100 mil
2. Set ALT-snapping to 25 mil
3. Create two 100 mil x 100 mil rectangle
4. ALT-move one of them so it if off the main grid
5. Now just do a regular move on the rectangle from step 4
6. Verify that the rectangle no longer snaps to the grid, and seems to have preserved an offset of its own.
The expected behaviour is that the object should _always_ snap to the grid when snap is on and you are not using "ALT".
Having these "hidden offsets" makes things confusing.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
