Revert "Merge branch 'master' into python-graphics-integration"

This reverts commit a8167c72d77793e076842b0cc0f84d6f6691dbf4, reversing
changes made to bda0929dac34b38a5ff2046464e85b7dd4227ac5.
Revert "Conflicts resolved"

This reverts commit bda0929dac34b38a5ff2046464e85b7dd4227ac5, reversing
changes made to c4e6ca29739020e0708bd53f192b583f395d9fb8.
Revert "Merge branch 'input-management' into python-graphics-integration"

This reverts commit c4e6ca29739020e0708bd53f192b583f395d9fb8, reversing
changes made to 7677fc47b324681fc1e3b744c978982ef595e404.