Fix Window.setFocus() unsetting focus if Interface has focus

interface/src/Application.cpp

@@ -7329,6 +7329,16 @@ bool Application::hasFocus() const {
     return (QApplication::activeWindow() != nullptr);
 }
 
+void Application::setFocus() {
+    // Note: Windows doesn't allow a user focus to be taken away from another application. Instead, it changes the color of and 
+    // flashes the taskbar icon.
+    auto window = qApp->getWindow();
+    window->activateWindow();
+    
+    // Do NOT do the following because it takes focus away from the _displayPlugin.
+    //window->setFocus();
+}
+
 void Application::setMaxOctreePacketsPerSecond(int maxOctreePPS) {
     if (maxOctreePPS != _maxOctreePPS) {
         _maxOctreePPS = maxOctreePPS;

interface/src/Application.h

@@ -160,6 +160,7 @@ public:
     QRect getRecommendedHUDRect() const;
     glm::vec2 getDeviceSize() const;
     bool hasFocus() const;
+    void setFocus();
 
     void showCursor(const Cursor::Icon& cursor);
 

interface/src/scripting/WindowScriptingInterface.cpp

@@ -74,9 +74,7 @@ QScriptValue WindowScriptingInterface::hasFocus() {
 void WindowScriptingInterface::setFocus() {
     // It's forbidden to call focus() from another thread.
     qApp->postLambdaEvent([] {
-        auto window = qApp->getWindow();
+        qApp->setFocus();
-        window->activateWindow();
-        window->setFocus();
     });
 }