QTfrontend: Fix flickering and bad offset of control config popup If you opened the pop-up to change a key, there was a very short flicker at the left side and the pop-up had a bad offset which sometimes caused entries to be out of screen bounds.

Directory for automated tests to test the engine.

Run `ctest` in the root directory of this repository to run all tests.
Run `ctest -R <test name>` to run only the test with the given name.

This requires you to have CMake.