MAINT-3832 Make color pickers actually apply result immediately when "apply...

MAINT-3832 Make color pickers actually apply result immediately when "apply immediately" is checked.

indra/newview/llcolorswatch.h

@@ -59,6 +59,7 @@ class LLColorSwatchCtrl
 		Optional<LLUIImage*>			alpha_background_image;
 		Optional<commit_callback_t> 	cancel_callback;
 		Optional<commit_callback_t> 	select_callback;
+		Optional<commit_callback_t>		preview_callback;
 		Optional<LLUIColor>				border_color;
 		Optional<S32>					label_width;
 		Optional<S32>					label_height;
@@ -87,6 +88,7 @@ class LLColorSwatchCtrl
 	void			setCanApplyImmediately(BOOL apply) { mCanApplyImmediately = apply; }
 	void			setOnCancelCallback(commit_callback_t cb) { mOnCancelCallback = cb; }
 	void			setOnSelectCallback(commit_callback_t cb) { mOnSelectCallback = cb; }
+	void			setPreviewCallback(commit_callback_t cb) { mPreviewCallback = cb; }
 	void			setFallbackImageName(const std::string& name) { mFallbackImageName = name; }
 
 	void			showPicker(BOOL take_focus);
@@ -112,6 +114,7 @@ class LLColorSwatchCtrl
 	BOOL			mCanApplyImmediately;
 	commit_callback_t mOnCancelCallback;
 	commit_callback_t mOnSelectCallback;
+	commit_callback_t mPreviewCallback;
 	S32             mLabelWidth;
 	S32             mLabelHeight;
 

indra/newview/llfloatercolorpicker.cpp

@@ -347,6 +347,11 @@ void LLFloaterColorPicker::setCurRgb ( F32 curRIn, F32 curGIn, F32 curBIn )
 	curG = curGIn;
 	curB = curBIn;
 
+	if (mApplyImmediateCheck->get())
+	{
+		LLColorSwatchCtrl::onColorChanged ( getSwatch (), LLColorSwatchCtrl::COLOR_CHANGE );
+	}
+
 	// update corresponding HSL values and
 	LLColor3(curRIn, curGIn, curBIn).calcHSL(&curH, &curS, &curL);
 
@@ -374,6 +379,11 @@ void LLFloaterColorPicker::setCurHsl ( F32 curHIn, F32 curSIn, F32 curLIn )
 
 	// update corresponding RGB values and
 	hslToRgb ( curH, curS, curL, curR, curG, curB );
+
+	if (mApplyImmediateCheck->get())
+	{
+		LLColorSwatchCtrl::onColorChanged ( getSwatch (), LLColorSwatchCtrl::COLOR_CHANGE );
+	}
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -463,10 +473,6 @@ void LLFloaterColorPicker::onImmediateCheck( LLUICtrl* ctrl, void* data)
 void LLFloaterColorPicker::onColorSelect( const LLTextureEntry& te )
 {
 	setCurRgb(te.getColor().mV[VRED], te.getColor().mV[VGREEN], te.getColor().mV[VBLUE]);
-	if (mApplyImmediateCheck->get())
-	{
-		LLColorSwatchCtrl::onColorChanged ( getSwatch (), LLColorSwatchCtrl::COLOR_CHANGE );
-	}
 }
 
 void LLFloaterColorPicker::onMouseCaptureLost()