Rework weapon scheme handling in frontend and fix a couple of bugs There were many oddities in weapon scheme editing which are fixed now: * When you left the weapon scheme editor, everything flashed briefly * When you leaft the weapon scheme editr, the weapon scheme selection always reverted to Default. Very annoying * Clicking on New or Copy now instantly creates and save the new weapons set

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Directory for automated tests to test the engine.

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Run `ctest` in the root directory of this repository to run all tests.

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Run `ctest -R <test name>` to run only the test with the given name.

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This requires you to have CMake.