3D Scale Snapping
In Scale mode you may set scale snap to specific step, 5, 10, 15, 30% etc.
When
button checked, 
	snapping is enabled. This option also available in tool inspector.
| Enable Snap | Enables or disables snapping. | 
| Step | Enter the step for scale in percents. | 
| Relative to previous scaling | If checked, snapping is relative to previous scaling. If not checked, snapping is relative to initial 100% scaling. | 
