Fix ApplicationPage when the origin is very long and exceeds the width

BUG: 388104

discover/qml/ApplicationPage.qml

@@ -176,10 +176,12 @@ DiscoverPage {
             text: i18n("Size: %1", appInfo.application.sizeDescription)
         }
         RowLayout {
+            Layout.fillWidth: true
             QQC2.Label {
                 text: i18n("Source:")
             }
             LinkButton {
+                Layout.fillWidth: true
                 enabled: alternativeResourcesView.count > 1
                 text: appInfo.application.displayOrigin
                 onClicked: originsOverlay.open()

discover/qml/LinkButton.qml

@@ -14,6 +14,7 @@ QQC2.Label {
     color: enabled ? Kirigami.Theme.linkColor : Kirigami.Theme.textColor
     horizontalAlignment: Text.AlignHCenter
     verticalAlignment: Text.AlignVCenter
+    elide: Text.ElideRight
 
     signal clicked()
     MouseArea {