Fix rotation would jump when using undo/redo and trying to modify again

[MrStevns]

Fixes a small bug where if you had rotated an object, then used undo/redo on it, and then rotated it again, the object would be rotated the amount of deg that was previously used when you interacted with it.

How to reproduce:

1. Draw a stroke
2. Select it using the Select tool
3. Rotate it using the Move tool
4. Move it somewhere else and rotate it 90 deg
5. Now undo until you're back at step 3.
6. Try to rotate the object again

Expected behavior:
The object doesn't rotate until you move the cursor around, and only as much as you rotate

Actual result:
The object rotates based on the previous value initially instead of only the current angle.

Before:	After

[J5lx]

LGTM, nice fix