Merge pull request #2262 from KomodoPlatform/fix-notifications-btn

handle button where no notifications

Author: smk762

atomic_defi_design/Dex/Dashboard/NotificationsModal.qml

@@ -622,8 +622,8 @@ DexPopup
         }
 
         OutlineButton
-        {
-            text: qsTr('Mark all as read')
+        {            
+            text: notifications_list.length !== 0 ? qsTr('Mark all as read') : qsTr('Close')
             height: 40
             width: 260
             Layout.alignment: Qt.AlignHCenter