EXP-1461 FIX Incoming Nearby chat not visible in chat toasts/bubbles to user when chat window is minimized with chat history opened

made minimizing and unminimizing nearby chat floater do the right thing

indra/newview/llnearbychatbar.cpp

@@ -399,6 +399,15 @@ void LLNearbyChatBar::onToggleNearbyChatPanel()
 	}
 }
 
+void LLNearbyChatBar::setMinimized(BOOL b)
+{
+	if (b != LLFloater::isMinimized())
+	{
+		LLFloater::setMinimized(b);
+		getChildView("nearby_chat")->setVisible(!b);
+	}
+}
+
 void LLNearbyChatBar::onChatBoxCommit()
 {
 	if (mChatBox->getText().length() > 0)

indra/newview/llnearbychatbar.h

@@ -60,6 +60,7 @@ public:
 	static void sendChatFromViewer(const LLWString &wtext, EChatType type, BOOL animate);
 
 	void showHistory();
+	/*virtual*/void setMinimized(BOOL b);
 
 protected:
 	static BOOL matchChatTypeTrigger(const std::string& in_str, std::string* out_str);