Add url menus to the text editor!!

Hey there, Alpha User! This commit is riddled with complex words,
but here's what matters to you: This adds the ability to right click a
Name, URL, SLURL, or Object Name, or even an Email, and get some awesome
options just like v3 gets! Buuuut, unlike V3, if there was something else
you might want to do, we've still got you covered in the same menu!!

Also make the text editor's default menu an xml
Synced a lot from upstream
Unlike Upstream, actually combine the base menu with the url menu if we have a selection
Unlike Upstream and previously, don't create a new menu per text editor
Unlike Upstream, don't create a separate FriendSignal and ObjectBlockedSignal per text editor we need it in!!
Unlike Upstream, always show a Select All option

indra/newview/llviewermenu.cpp

@@ -127,6 +127,7 @@
 #include "llfloaternotificationsconsole.h"
 
 // <edit>
+#include "lltexteditor.h" // Initialize the text editor menu listeners in here
 #include "llfloatermessagelog.h"
 #include "shfloatermediaticker.h"
 #include "llpacketring.h"
@@ -9604,6 +9605,11 @@ void initialize_menus()
 
 	add_radar_listeners();
 
+	// Text Editor menus
+	LLTextEditor::setIsObjectBlockedCallback(boost::bind(&LLMuteList::isMuted, LLMuteList::getInstance(), _1, _2, 0));
+	LLTextEditor::setIsFriendCallback(LLAvatarActions::isFriend);
+	LLTextEditor::addMenuListeners();
+
 	class LLViewBuildMode : public view_listener_t
 	{
 		bool handleEvent(LLPointer<LLEvent> event, const LLSD& userdata)