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/llui/lluictrl.h

@@ -54,9 +54,8 @@ public:
 	typedef BOOL (*LLUICtrlValidate)(LLUICtrl* ctrl, void* userdata);
 
 	LLUICtrl();
-	LLUICtrl( const std::string& name, const LLRect& rect, BOOL mouse_opaque,
-		LLUICtrlCallback callback,
-		void* callback_userdata,
+	LLUICtrl( const std::string& name, const LLRect rect = LLRect(), BOOL mouse_opaque = TRUE,
+		commit_callback_t commit_callback = NULL,
 		U32 reshape=FOLLOWS_NONE);
 	/*virtual*/ ~LLUICtrl();