UI cleanup.

-Added ui-local transformation matrix.
-Gutted legacy commitcallbacks throughout ui widget ctors.
-Created filter_editor ui widget which issues commit on keypress
   -search_editor commits on focus loss/enter press
   -search_editor and filter_editor now have a built in 'x' button to clear text.
-LLComboBox::setPrearrangeCallback now uses boost::function
-LLComboBox::setTextEntryCallback now uses boost::function
-LLLineEditor::setKeystrokeCallback now uses boost::function
-LLLineEditor::setPrevalidate now uses boost::function
-LLPanel::childSetKeystrokeCallback removed
-LLPanel::childSetPrevalidate removed
-LLPanel::childSetActionTextbox now uses boost::function
-LLTextBox::setClickedCallback now uses boost::function
-LLTextEditor::setKeystrokeCallback added.
-Cleaned up JCFloaterAreaSearch

indra/newview/llfloaterimagepreview.cpp

@@ -721,6 +721,8 @@ BOOL LLImagePreviewAvatar::render()
 	mNeedsUpdate = FALSE;
 	LLVOAvatar* avatarp = mDummyAvatar;
 
+	gGL.pushUIMatrix();
+	gGL.loadUIIdentity();
 
 	gGL.matrixMode(LLRender::MM_PROJECTION);
 	gGL.pushMatrix();
@@ -785,6 +787,7 @@ BOOL LLImagePreviewAvatar::render()
 		}
 	}
 
+	gGL.popUIMatrix();
 	gGL.color4f(1,1,1,1);
 	return TRUE;
 }