standardize arrow functions, use implicit types where applicable

src/ViewModel/Global/settingsViewModel.ts

@@ -5,7 +5,7 @@ import { Languages, ThemeSettings } from "../../Model/Global/settingsModel";
 import { CommonKeys } from "../../View/keystrokes";
 
 export default class SettingsViewModel extends Context {
-    contextDebugDescription = "settings";
+    contextDebugDescription: string = "settings";
 
     // state
     username: React.State<string> = new React.State("");