Transfer: warn on long Payment ID filled into description field

pages/Transfer.qml

@@ -56,7 +56,7 @@ Rectangle {
     property bool showAdvanced: false
     // @TODO: remove after pid removal hardfork
     property bool warningLongPidTransfer: false
-    property bool warningLongPidDescription: false
+    property bool warningLongPidDescription: descriptionLine.text.match(/^[0-9a-f]{64}$/i)
 
     Clipboard { id: clipboard }
 
@@ -331,6 +331,12 @@ Rectangle {
           }
       }
 
+      MoneroComponents.WarningBox {
+          text: qsTr("Description field contents match long payment ID format. \
+          Please don't paste long payment ID into description field, your funds might be lost.") + translationManager.emptyString;
+          visible: warningLongPidDescription
+      }
+
       ColumnLayout {
           spacing: 15