Fixed printer buttons conform UX design

Contributes to CURA-8689

resources/qml/WelcomePages/AddUltimakerOrThirdPartyPrinter.qml

@@ -51,7 +51,6 @@ Control
             {
                 id: ultimakerPrinterCard
                 Layout.alignment: Qt.AlignBottom
-                borderHeight: thrirdPartyPrinterCard.height
                 onClicked: goToUltimakerPrinter
                 text: catalog.i18nc("@button", "Ultimaker printer")
                 imageSource: UM.Theme.getImage("ultimaker_printer")

resources/qml/WelcomePages/PrinterCard.qml

@@ -13,7 +13,6 @@ Control
     id: root
     property alias text: link_text.text
     property alias imageSource: image.source
-    property alias borderHeight: background.height
     property var onClicked
 
     states:
@@ -50,7 +49,6 @@ Control
     background: Rectangle
     {
         id: background
-        anchors.bottom: column.bottom
         height: parent.height
         border.color: UM.Theme.getColor("primary_button")
         color: "transparent"