LLGroupActions too! (Strengthens RLVa restrictions!)

Cleans up llfloatergroupinfo, makes it an instance tracker... pretty much as nice as llfloateravatarinfo now ^*^
Adds notifications JoinGroupNoCost and JoinedTooManyGroups (added to our existing translations, of course)
Cleans up all around, placing groupactions around.

Touches up bits for avataractions

indra/newview/llpanelgroupinvite.cpp

@@ -39,6 +39,7 @@
 #include "llbutton.h"
 #include "llcallingcard.h"
 #include "llcombobox.h"
+#include "llgroupactions.h"
 #include "llgroupmgr.h"
 #include "llnamelistctrl.h"
 #include "llnotificationsutil.h"
@@ -49,8 +50,6 @@
 #include "lluictrlfactory.h"
 #include "llviewerwindow.h"
 
-#include <boost/signals2.hpp>
-
 class LLPanelGroupInvite::impl : public boost::signals2::trackable
 {
 public:
@@ -183,7 +182,7 @@ void LLPanelGroupInvite::impl::submitInvitations()
 		 iter != items.end(); ++iter)
 	{
 		LLScrollListItem* item = *iter;
-		if(gdatap->mMembers.find(item->getUUID()) != gdatap->mMembers.end())
+		if(LLGroupActions::isAvatarMemberOfGroup(mGroupID, item->getUUID()))
 		{
 			already_in_group = true;
 			continue;