PSA: how to prepare apps for non-Plasma X-based shells and their app panels

Hi, quick heads-up for anyone maintaining applications which also target non- Plasma shells (X-based, no issue with wayland-based systems): TL;DR Make sure to have "StartupWMClass=myapp" in the (main) application desktop file if both WM_CLASS properties of the application window do _not_ match

[ANNOUNCE] CMake 3.13.4 available for download

We are pleased to announce that CMake 3.13.4 is now available for download. Please use the latest release from our download page: https://cmake.org/download/ Thanks for your support! - Changes in 3.13.4 since 3.13.3: Ben