Fix notification queue and add gem action (#4985)

Signed-off-by: AMZN-alexpete <26804013+AMZN-alexpete@users.noreply.github.com>

Code/Framework/AzQtComponents/AzQtComponents/Components/ToastNotification.cpp

@@ -22,6 +22,7 @@ namespace AzQtComponents
         , m_closeOnClick(true)
         , m_ui(new Ui::ToastNotification())
         , m_fadeAnimation(nullptr)
+        , m_configuration(toastConfiguration)
     {
         setProperty("HasNoWindowDecorations", true);
 
@@ -80,7 +81,13 @@ namespace AzQtComponents
     }
 
     ToastNotification::~ToastNotification()
-    {        
+    {
+    }
+
+    bool ToastNotification::IsDuplicate(const ToastConfiguration& toastConfiguration)
+    {
+        return toastConfiguration.m_title == m_configuration.m_title 
+            && toastConfiguration.m_description == m_configuration.m_description;
     }
 
     void ToastNotification::paintEvent(QPaintEvent* event)

Code/Framework/AzQtComponents/AzQtComponents/Components/ToastNotification.h

@@ -45,6 +45,8 @@ namespace AzQtComponents
         void ShowToastAtPoint(const QPoint& screenPosition, const QPointF& anchorPoint);
 
         void UpdatePosition(const QPoint& screenPosition, const QPointF& anchorPoint);
+
+        bool IsDuplicate(const ToastConfiguration& toastConfiguration);
         
         // QDialog
         void showEvent(QShowEvent* showEvent) override;
@@ -64,7 +66,7 @@ namespace AzQtComponents
         
     private:
         QPropertyAnimation* m_fadeAnimation;
-
+        ToastConfiguration m_configuration;
         bool   m_closeOnClick;
         QTimer m_lifeSpan;
         uint32_t m_borderRadius = 0;