Handling of dependecy version in code
We currenty have code blocks dedicated to check the OpenCV or Qwt version. As long as all functionality can be implemented in the newer version, there is no benefit to supportion older ones. And setting a minimum verison can happen via the buildsystem (CMake).
The following discussion from !110 (merged) should be addressed:
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@t.schroedter started a discussion: Do we still need this, as we only support OpenCV 4.2 (and newer at some point)? It will already fail at CMake configuration time. Suggestion: Open an issue for this, as this is not the scope of this MR