Make color_picker_hsva_2d public. (#1091)

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

Author: HackerFoo

egui/src/widgets/color_picker.rs

@@ -308,8 +308,10 @@ fn color_picker_hsvag_2d(ui: &mut Ui, hsva: &mut HsvaGamma, alpha: Alpha) {
     color_slider_2d(ui, v, s, |v, s| HsvaGamma { s, v, ..opaque }.into());
 }
 
+//// Shows a color picker where the user can change the given [`Hsva`] color.
+///
 /// Returns `true` on change.
-fn color_picker_hsva_2d(ui: &mut Ui, hsva: &mut Hsva, alpha: Alpha) -> bool {
+pub fn color_picker_hsva_2d(ui: &mut Ui, hsva: &mut Hsva, alpha: Alpha) -> bool {
     let mut hsvag = HsvaGamma::from(*hsva);
     ui.vertical(|ui| {
         color_picker_hsvag_2d(ui, &mut hsvag, alpha);
@@ -323,7 +325,7 @@ fn color_picker_hsva_2d(ui: &mut Ui, hsva: &mut Hsva, alpha: Alpha) -> bool {
     }
 }
 
-/// Shows a color picker where the user can change the given color.
+/// Shows a color picker where the user can change the given [`Color32`] color.
 ///
 /// Returns `true` on change.
 pub fn color_picker_color32(ui: &mut Ui, srgba: &mut Color32, alpha: Alpha) -> bool {