kcms/users: don't let "Choose File…" text overflow

When using a language that's wordier than English and this label becomes
a two-line string, currently the layout breaks and the string overflows
because the Label item that draws it has no maximum height and elision
mode set.

This commit fixes that by setting them accordingly, and also using a
standard icon size for the icon so that there's actually enough room for
two lines of text.

BUG: 458614
FIXED-IN: 5.24.7

kcms/users/package/contents/ui/UserDetailsPage.qml

@@ -281,28 +281,38 @@ SimpleKCM {
                     Layout.rightMargin: Kirigami.Units.largeSpacing
 
                     QQC2.Button {
+                        id: openButton
                         Layout.preferredHeight: Kirigami.Units.gridUnit * 6
                         Layout.preferredWidth: Layout.preferredHeight
 
-                        ColumnLayout {
-                            anchors.centerIn: parent
+                        contentItem: Item {
+                            ColumnLayout {
+                                // Centering rather than filling is desired to keep the
+                                // entire layout nice and tight when the text is short
+                                anchors.centerIn: parent
+                                spacing: 0 // the icon should bring its own
 
-                            Kirigami.Icon {
-                                implicitWidth: Kirigami.Units.gridUnit * 4
-                                implicitHeight: Kirigami.Units.gridUnit * 4
-                                source: "document-open"
+                                Kirigami.Icon {
+                                    id: openIcon
 
-                                Layout.alignment: Qt.AlignHCenter
-                            }
-                            QQC2.Label {
-                                text: i18n("Choose File…")
-
-                                horizontalAlignment: Text.AlignHCenter
-                                verticalAlignment: Text.AlignBottom
-                                fontSizeMode: Text.HorizontalFit
-                                wrapMode: Text.Wrap
-                                Layout.fillWidth: true
-                                Layout.maximumWidth: Kirigami.Units.gridUnit * 5
+                                    implicitWidth: Kirigami.Units.iconSizes.huge
+                                    implicitHeight: Kirigami.Units.iconSizes.huge
+                                    source: "document-open"
+
+                                    Layout.alignment: Qt.AlignHCenter
+                                }
+                                QQC2.Label {
+                                    text: i18n("Choose File…")
+
+                                    Layout.fillWidth: true
+                                    Layout.maximumWidth: Kirigami.Units.gridUnit * 5
+                                    Layout.maximumHeight: openButton.availableHeight - openIcon.height
+                                    horizontalAlignment: Text.AlignHCenter
+                                    verticalAlignment: Text.AlignBottom
+                                    fontSizeMode: Text.HorizontalFit
+                                    wrapMode: Text.Wrap
+                                    elide: Text.ElideRight
+                                }
                             }
                         }