Merge pull request #3084 from aws-lumberyard-dev/cgalvan/FixEMFXModalToastNotifications

Prevent EMFX notifications from being modal, which was blocking input while visible.

Gems/EMotionFX/Code/EMotionFX/Tools/EMotionStudio/EMStudioSDK/Source/NotificationWindow.cpp

@@ -28,7 +28,7 @@ namespace EMStudio
         setWindowTitle("Notification");
 
         // window, no border, no focus, stays on top
-        setWindowFlags(Qt::Popup | Qt::FramelessWindowHint | Qt::WindowDoesNotAcceptFocus);
+        setWindowFlags(Qt::Window | Qt::FramelessWindowHint | Qt::WindowDoesNotAcceptFocus | Qt::WindowStaysOnTopHint);
 
         // enable the translucent background
         setAttribute(Qt::WA_TranslucentBackground);