Increase size of buildplate icon in monitor page

CURA-8202

plugins/UM3NetworkPrinting/resources/qml/MonitorBuildplateConfiguration.qml

@@ -50,7 +50,7 @@ Item
                 id: buildplateIcon
                 anchors.centerIn: parent
                 color: UM.Theme.getColor("monitor_icon_primary")
-                height: parent.height
+                height: UM.Theme.getSize("medium_button_icon").width
                 source: "../svg/icons/Buildplate.svg"
                 width: height
                 visible: buildplate