chore: Better connection status indicator

lib/utils/sync_status_localization.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+import 'package:matrix/matrix.dart';
+
+import 'package:fluffychat/utils/localized_exception_extension.dart';
+
+extension SyncStatusLocalization on SyncStatusUpdate {
+  String calcLocalizedString(BuildContext context) {
+    final progress = this.progress;
+    switch (status) {
+      case SyncStatus.waitingForResponse:
+        return L10n.of(context).waitingForServer;
+      case SyncStatus.error:
+        return ((error?.exception ?? Object()) as Object)
+            .toLocalizedString(context);
+      case SyncStatus.processing:
+      case SyncStatus.cleaningUp:
+      case SyncStatus.finished:
+        return progress == null
+            ? L10n.of(context).synchronizingPleaseWait
+            : L10n.of(context).synchronizingPleaseWaitCounter(
+                progress.round().toString(),
+              );
+    }
+  }
+}