Remove boilerplate from Gcolor3HSV by using newer macros
Original:
There is still some deprecated API usage in Gcolor3HSV that should be updated. Likewise, we can probably make use of some newer macros to define the widget.
Update as of Nov 2, 2019:
The deprecated API is now removed, but we can clean up the file by using newer macros to define the widget.
Edited by Christopher Davis