2.5

Quick Color picker alternative!

- only a color circle + value slider
- exits immediate after use, or slight mouse move outside picker
- use scrollwheel to change HSV 'value'. Also works while picking.
- added nicer AA'ed cursor in picker
- All color swatches change 'value' on ALT+Wheel mouse-over

Old picker is still there, under SHIFT+click on swatch. Needs
evaluation... part of UI keymap? Per button type? Or divide
picker in left/right? Or just have all those old picker buttons
in another panel... I'm not to fond of this giant old popup.

source/blender/editors/interface/interface.c

@@ -2232,7 +2232,7 @@ static uiBut *ui_def_but(uiBlock *block, int type, int retval, char *str, short
 		}
 	}
 	
-	if(but->type==HSVCUBE) { /* hsv buttons temp storage */
+	if(ELEM(but->type, HSVCUBE, HSVCIRCLE)) { /* hsv buttons temp storage */
 		float rgb[3];
 		ui_get_but_vectorf(but, rgb);
 		rgb_to_hsv(rgb[0], rgb[1], rgb[2], but->hsv, but->hsv+1, but->hsv+2);