Set textFormat in Label to StyledText

Apparently AutoText isn't smart enough to detect this


(cherry picked from commit 0512e055)

discover/qml/ApplicationPage.qml

@@ -192,6 +192,7 @@ DiscoverPage {
                 Layout.fillWidth: true
                 wrapMode: Text.WordWrap
                 text: appInfo.application.longDescription
+                textFormat: Text.StyledText
                 onLinkActivated: Qt.openUrlExternally(link);
             }