QML: use functions for Connections event handlers

The block statement style is deprecated in Qt 6 (but only in the
Connections object, not other ones).

Author: slipher

DownloadInfo.qml

@@ -189,7 +189,7 @@ Item {
         target: downloader
         ignoreUnknownSignals: true
 
-        onStateChanged: {
+        function onStateChanged(state) {
             downloadInfo.visible = state !== QmlDownloader.COMPLETED;
             if (state === QmlDownloader.DOWNLOADING) {
                 downloadAction.iconName = "av/pause";

main.qml

@@ -37,11 +37,11 @@ ApplicationWindow {
     Connections {
         target: downloader
         ignoreUnknownSignals: true
-        onStatusMessage: {
+        function onStatusMessage(message) {
             console.log("Download status: " + message);
             infoBar.open(message);
         }
-        onFatalMessage: {
+        function onFatalMessage(message) {
             console.log("Installation failed: " + message);
             errorPopup.errorDetail = message;
             errorPopup.open();

splash.qml

@@ -60,7 +60,7 @@ ApplicationWindow {
     Connections {
         target: splashController
 
-        onUpdateNeeded: {  // game update only
+        function onUpdateNeeded(updateNeeded) {  // game update only
             if (updateNeeded) {
                 showUpdater()
             } else {
@@ -69,7 +69,7 @@ ApplicationWindow {
             }
         }
 
-        onUpdaterUpdate: {
+        function onUpdaterUpdate(version) {
             downloader.startUpdaterUpdate(version);
             updaterUpdateLabel.visible = true;
 
@@ -95,7 +95,7 @@ ApplicationWindow {
         id: splashDownloaderConnections
         target: downloader
 
-        onFatalMessage: {
+        function onFatalMessage(message) {
             updateFailed.errorDetail = message;
             updateFailedWindow.show();
             updateFailed.open();