Three Points Rectangle, Measure and Tests update

Today I added the Three Points Rectangle, which gives us more flexibility when drawing rectangles, as its sides don't have to be parallel to the axes. Here is a demonstration where three rectangles are drawn on the side of an extrude:



I also fixed the Measure tool and since it is applied only on Sketch shapes, I've moved it under the Dimension tool:



As you can see, the Dimension tool is used for lines, when we want the length to remain displayed, and the measure tool when we want to check the distance between any two points on the scene.

I also updated the tests, fixed some of them and added new methods for the Mirror Point and Mirror Line tests. There are 79 TreeDataTest, with 8 failures and 2 ignored tests: