Make emote popup remember last position (#1580)

* Use existing moveTo to ensure window stay within desktop geometry

src/singletons/WindowManager.hpp

@@ -51,6 +51,9 @@ public:
     int windowCount();
     Window *windowAt(int index);
 
+    QPoint emotePopupPos();
+    void setEmotePopupPos(QPoint pos);
+
     virtual void initialize(Settings &settings, Paths &paths) override;
     virtual void save() override;
     void closeAll();
@@ -89,6 +92,8 @@ private:
 
     bool initialized_ = false;
 
+    QPoint emotePopupPos_;
+
     std::atomic<int> generation_{0};
 
     std::vector<Window *> windows_;