Add option to hide minimal shade selector in wide gamut docker.
This extracts some code from !1798 (closed) to fix BUG:472945
Test Plan
Go into wide-gamut docker settings-> shade selector-> toggle show minimal shade selector
Formalities Checklist
-
I confirmed this builds. -
I confirmed Krita ran and the relevant functions work. -
I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!) -
I made sure my commits build individually and have good descriptions as per KDE guidelines. -
I made sure my code conforms to the standards set in the HACKING file. -
I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per KDE Licensing Policy. -
Does the patch add a user-visible feature? If yes, is there a documentation MR ready for it at Krita Documentation Repository?