UI Controls: remove anchors from SecondaryListLabel

Prefer to set anchor values when the component is used, instead of
setting them within the reusable component.

Author: blammit

components/listitems/core/ListRadioButton.qml

@@ -17,6 +17,7 @@ ListItem {
 
 	content.children: [
 		SecondaryListLabel {
+			anchors.verticalCenter: parent.verticalCenter
 			text: root.secondaryText
 			width: Math.min(implicitWidth, root.maximumContentWidth - radioButton.width - Theme.geometry_listItem_content_spacing)
 			visible: text.length > 0

components/listitems/core/ListText.qml

@@ -16,6 +16,7 @@ ListItem {
 	content.children: [
 		SecondaryListLabel {
 			id: secondaryLabel
+			anchors.verticalCenter: parent.verticalCenter
 			text: dataItem.valid ? dataItem.value : ""
 			width: Math.min(implicitWidth, root.maximumContentWidth)
 			visible: text.length > 0

components/listitems/core/ListTextField.qml

@@ -216,6 +216,7 @@ ListItem {
 	SecondaryListLabel {
 		id: readonlyLabel
 
+		anchors.verticalCenter: parent.verticalCenter
 		text: textField.text.length > 0 ? textField.text : "--"
 		width: Math.min(implicitWidth, root.maximumContentWidth)
 		visible: !textField.visible && textField.echoMode !== TextInput.Password

components/listitems/core/SecondaryListLabel.qml

@@ -12,6 +12,4 @@ Label {
 	wrapMode: Text.Wrap
 	horizontalAlignment: Text.AlignRight
 	verticalAlignment: Text.AlignVCenter
-	anchors.verticalCenter: parent.verticalCenter
-
 }