Right click menu

Succeeded to make the right click menu work. The code reads the capabilities of the selected shape and builds the menu. As functionality it works the same as the ribbon tab that was added to display the capabilities code (currently only Extrude functionality is activated). Probably that ribbon tab will be removed.

The menu was implemented as a windows forms context menu hosted together with the MultiView control on which OpenCascade renders.

As functionality on the right click menu thinking to add beside the shape capabilities also some functionality like hide/delete shape, copy/paste, maybe some selection improvement.

Will continue fixing the critical bugs as around Thursday a release is planned.