Hooked LLTrans into LLNotification stuffs. Also, fixed [CURRENCY] showing up in several places on the buy land window.

indra/newview/llviewermessage.cpp

@@ -774,7 +774,6 @@ bool join_group_response(const LLSD& notification, const LLSD& response)
 			delete_context_data = FALSE;
 			LLSD args;
 			args["COST"] = llformat("%d", fee);
-			args["CURRENCY"] = gHippoGridManager->getConnectedGrid()->getCurrencySymbol();
 			// Set the fee for next time to 0, so that we don't keep
 			// asking about a fee.
 			LLSD next_payload = notification["payload"];