add two popups

src/qml/ErrorMsgPopup.qml

@@ -0,0 +1,5 @@
+import QtQuick 2.0
+
+PopupBase {
+
+}

src/qml/PopupBase.qml

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+import QtQuick 2.11
+import QtQuick.Window 2.11
+import QtQuick.Controls 2.2
+
+Popup {
+    id: root
+    modal: true
+    focus: true
+    dim: true
+
+    //transformOrigin: Item.Center
+    x: parent ? ((parent.width - width) / 2) : 0
+    y: parent ? ((parent.height - height) / 2) : 0
+    width: parent ? (parent.width / 2 - margin) : 128
+    height: parent ? (parent.height / 2 - margin) : 128
+    padding: 0
+
+    closePolicy: Popup.CloseOnEscape | Popup.CloseOnReleaseOutside
+
+    enter: Transition {
+        PropertyAnimation {
+           property: "opacity";
+           from: 0.3; to: 1.0
+           duration: 500
+        }
+   }
+
+    exit: Transition {
+        NumberAnimation {
+           property: "opacity";
+           from: 1.0; to: 0.3
+           duration: 500
+        }
+   }
+
+}