refactor: /command hints add tooltips, test for missing hints, script to generate glue code, hints for dm, create, clearcache, discardsession

test/command_hint_test.dart

@@ -0,0 +1,23 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:flutter_test/flutter_test.dart';
+
+import 'utils/test_client.dart';
+
+void main() async {
+  test('Check for missing /command hints', () async {
+    final translated =
+        jsonDecode(File('assets/l10n/intl_en.arb').readAsStringSync())
+            .keys
+            .where((String k) => k.startsWith('commandHint_'))
+            .map((k) => k.replaceFirst('commandHint_', ''));
+    final commands = (await prepareTestClient()).commands.keys;
+    final missing = commands.where((c) => !translated.contains(c)).toList();
+
+    expect(0, missing.length,
+        reason: 'missing hints for ' +
+            missing.toString() +
+            '\nAdding hints? See scripts/generate_command_hints_glue.sh');
+  });
+}