Add max length to machine name textbox

CURA-6435

resources/qml/WelcomePages/AddLocalPrinterScrollView.qml

@@ -213,6 +213,7 @@ Item
             anchors.verticalCenter: parent.verticalCenter
             width: (parent.width / 2) | 0
             placeholderText: catalog.i18nc("@text", "Please give your printer a name")
+            maximumLength: 40
 
             // Make sure that the fill is not empty
             validator: RegExpValidator { regExp: /.+/ }