Top-align lock/login/logout screen action buttons

This way the icons are always vertically aligned even when some of
their labels are multi-line strings.

BUG: 450238
FIXED-IN: 5.24.2

lookandfeel/contents/components/SessionManagementScreen.qml

@@ -100,7 +100,7 @@ FocusScope {
         Row { //deliberately not rowlayout as I'm not trying to resize child items
             id: actionItemsLayout
             spacing: PlasmaCore.Units.largeSpacing / 2
-            Layout.alignment: Qt.AlignHCenter
+            Layout.alignment: Qt.AlignHCenter | Qt.AlignTop
         }
         Item {
             Layout.fillHeight: true

lookandfeel/contents/logout/Logout.qml

@@ -156,7 +156,7 @@ PlasmaCore.ColorScope {
 
         RowLayout {
             spacing: PlasmaCore.Units.largeSpacing * 2
-            Layout.alignment: Qt.AlignHCenter
+            Layout.alignment: Qt.AlignHCenter | Qt.AlignTop
             LogoutButton {
                 id: suspendButton
                 iconSource: "system-suspend"

[ivan tkachenko]

I'm having hard times trying to understand: how pinning the whole Row is supposed to help with aligning its children buttons? Especially, given the Item { Layout.fillHeight: true } below, it shouldn't make any difference at all.

[ivan tkachenko]

In this case, the LogoutButton is a subtype of ActionButton with a Layout.alignment: Qt.AlignTop property already set, so the logout screen should have been alright without any patches.

The bug report 450238 was about lock screen only, which is a SessionManagementScreen component subtyped as MainBlock and finally being used in LockScreenUi.qml. There are a bunch of bare ActionButtons without any Layout.alignment adjustments. But there's something extremely cursed going on instead:

anchors.verticalCenter: parent.top