Merge color picker tool and ctrl+gesture picking
The patch basically merges the algorithms used for ctrl-gesture color picking and the color picker tool. The tool now also works asynchronously, which potentially fixes a lot of "recursive events" bugs cased by blocking waits inside the event loop.
Test plan
- Test if Ctrl+click color picking works as expected
- Test if all the options of the Color Pick Tool work as expectred
- Test if the options saved in the Color Pick Tool are automatically applied to the Ctrl+click color picking gesture