Fix game window width/height setting being broken when using Arabic locale
Qt displays numbers differently in Arabic. The spinbox window height/width used
getText instead of value to get the value, which was wrong because this gets
the user-facing string (in arabic) instead of the number to use internally.
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.