MP-4315: Remove WindowPlugins.dll file in Setup Post section so it gets deleted in update installations
Merge branch 'MP1-4315-FEAT-Blow_windowplugins_dll_to_separate_plugin_dlls' of https://github.com/MediaPortal/MediaPortal-1 into MP1-4315-FEAT-Blow_windowplugins_dll_to_separate_plugin_dlls