Toggle to disable update check on detail page (#659), string capitalization consistency

lib/pages/app.dart

@@ -44,7 +44,10 @@ class _AppPageState extends State<AppPage> {
         ? sourceProvider.getSource(app.app.url,
             overrideSource: app.app.overrideSource)
         : null;
-    if (!areDownloadsRunning && prevApp == null && app != null) {
+    if (!areDownloadsRunning &&
+        prevApp == null &&
+        app != null &&
+        settingsProvider.checkUpdateOnDetailPage) {
       prevApp = app;
       getUpdate(app.app.id);
     }

lib/pages/settings.dart

@@ -240,6 +240,21 @@ class _SettingsPageState extends State<SettingsPage> {
                                     })
                               ],
                             ),
+                            height16,
+                            Row(
+                              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                              children: [
+                                Flexible(
+                                    child: Text(tr('checkUpdateOnDetailPage'))),
+                                Switch(
+                                    value: settingsProvider
+                                        .checkUpdateOnDetailPage,
+                                    onChanged: (value) {
+                                      settingsProvider.checkUpdateOnDetailPage =
+                                          value;
+                                    })
+                              ],
+                            ),
                             height32,
                             Text(
                               tr('sourceSpecific'),

lib/providers/settings_provider.dart

@@ -282,4 +282,13 @@ class SettingsProvider with ChangeNotifier {
     prefs?.setBool('removeOnExternalUninstall', show);
     notifyListeners();
   }
+
+  bool get checkUpdateOnDetailPage {
+    return prefs?.getBool('checkUpdateOnDetailPage') ?? true;
+  }
+
+  set checkUpdateOnDetailPage(bool show) {
+    prefs?.setBool('checkUpdateOnDetailPage', show);
+    notifyListeners();
+  }
 }