Medium sized Color Picker; consisting of number sliders, row buttons to
select rgb/hsv/hex, HS circle and V slider. It opens persistant, like
old picker.
This one opens default, other two can be accessed with ALT or SHIFT click.
On todo;
- eyedropper tool back
- method for click-drag to make mini picker appear
Note for UI coders (brecht :), added a UI_HIDDEN flag in buttons, to
support switching buttons in menus. Hidden buttons are not activated nor
drawn.