qml: wizard use flatbuttons

electrum/gui/qml/components/wizard/Wizard.qml

@@ -150,36 +150,42 @@ ElDialog {
                 currentIndex: pages.currentIndex
             }
 
-            RowLayout {
-                Layout.alignment: Qt.AlignHCenter
-                Button {
+            ButtonContainer {
+                Layout.fillWidth: true
+
+                FlatButton {
+                    Layout.fillWidth: true
+                    Layout.preferredWidth: 1
                     visible: pages.currentIndex == 0
                     text: qsTr("Cancel")
                     onClicked: wizard.reject()
                 }
-
-                Button {
+                FlatButton {
+                    Layout.fillWidth: true
+                    Layout.preferredWidth: 1
                     visible: pages.currentIndex > 0
                     text: qsTr('Back')
                     onClicked: pages.prev()
                 }
-
-                Button {
+                FlatButton {
+                    Layout.fillWidth: true
+                    Layout.preferredWidth: 1
                     text: qsTr("Next")
                     visible: !pages.lastpage
                     enabled: pages.pagevalid
                     onClicked: pages.next()
                 }
-
-                Button {
+                FlatButton {
                     id: finishButton
+                    Layout.fillWidth: true
+                    Layout.preferredWidth: 1
                     text: qsTr("Finish")
                     visible: pages.lastpage
                     enabled: pages.pagevalid
                     onClicked: pages.finish()
                 }
-
             }
+
         }
     }