[Radar] Reroute some code, optimize silly stuff away.

No more dead state, death is instant when you disappear
No more dependency on frame or life time, updates come from the sims.
No need to rate control anymore, ui removed.

RIP: My headphones, you were shortlived, but you served my ears well.

indra/newview/llviewerregion.cpp

@@ -57,6 +57,7 @@
 #include "llcommandhandler.h"
 #include "lldir.h"
 #include "lleventpoll.h"
+#include "llfloateravatarlist.h"
 #include "llfloatergodtools.h"
 #include "llfloaterperms.h"
 #include "llfloaterreporter.h"
@@ -1250,6 +1251,7 @@ LLHTTPRegistration<CoarseLocationUpdate>
 void LLViewerRegion::updateCoarseLocations(LLMessageSystem* msg)
 {
 	//LL_INFOS() << "CoarseLocationUpdate" << LL_ENDL;
+	std::list<LLUUID> map_avids(mMapAvatarIDs.begin(), mMapAvatarIDs.end());
 	mMapAvatars.reset();
 	mMapAvatarIDs.reset(); // only matters in a rare case but it's good to be safe.
 
@@ -1304,9 +1306,16 @@ void LLViewerRegion::updateCoarseLocations(LLMessageSystem* msg)
 			if(has_agent_data)
 			{
 				mMapAvatarIDs.put(agent_id);
+				map_avids.remove(agent_id);
 			}
 		}
 	}
+	if (LLFloaterAvatarList::instanceExists())
+	{
+		LLFloaterAvatarList& inst(LLFloaterAvatarList::instance());
+		inst.updateAvatarList(this);
+		inst.expireAvatarList(map_avids);
+	}
 }
 
 void LLViewerRegion::getInfo(LLSD& info)