Introduce a discrete rotation tool for rotating 2d objects in the form editor.

Currently rotation can only be achieved by using the property in the advanced tab. Items will rotate around the origin point selected in the advanced properties. Both of these properties should be moved to the item geometry section.

We want to introduce a toggle tool in the form editor menu that when active allows you to drag on an item to rotate it.

Dragging should move the rotation in it's smallest step size, dragging while holding shift should lock the drag to 5° steps.

Currently after an item has been rotated it is no longer possible to interact with the transform corners of the item, it would be great if that can be fixed as well.