Webatrice: KnownHosts component (#4456)

* refactor dexie services for future schema updates

Co-authored-by: Jeremy Letto <jeremy.letto@datasite.com>

webclient/src/services/dexie/DexieDTOs/SettingDTO.ts

@@ -0,0 +1,22 @@
+import { Setting } from 'types';
+
+import { dexieService } from '../DexieService';
+
+export class SettingDTO extends Setting {
+  constructor(user) {
+    super();
+
+    this.user = user;
+    this.autoConnect = false;
+  }
+
+  save() {
+    return dexieService.settings.put(this);
+  }
+
+  static get(user) {
+    return dexieService.settings.where('user').equalsIgnoreCase(user).first();
+  }
+};
+
+dexieService.settings.mapToClass(SettingDTO);