The command line now supports relative coordinates, it needs to contain an @, for example

@10, 10, 10

The @ can be anywhere in the coordinate.

I fixed a bug with the history of coordinates and numbers, which added a blank line in the history.
The PR was updated with these changes.

I began the unit tests of the command line, that needed some modifications to the CMakeLists.txt to include Qt but I don't want the unit tests to depend on Qt.
I added an option to disable compilation of lcUI.