standardize arrow functions, use implicit types where applicable

src/ViewModel/Chat/chatListViewModel.ts

@@ -14,7 +14,7 @@ export default class ChatListViewModel {
     notificationViewModel: NotificationViewModel;
 
     // data
-    chatIndexManager: IndexManager<ChatViewModel> = new IndexManager(
+    chatIndexManager = new IndexManager<ChatViewModel>(
         (chatViewModel: ChatViewModel) =>
             chatViewModel.settingsPageViewModel.primaryChannel.value,
     );

src/ViewModel/Global/fileTransferViewModel.ts

@@ -13,7 +13,7 @@ import CoreViewModel, { Context } from "./coreViewModel";
 import { CommonKeys } from "../../View/keystrokes";
 
 export default class FileTransferViewModel extends Context {
-    contextDebugDescription = "transfer";
+    contextDebugDescription: string = "transfer";
 
     // state
     presentedModal: React.State<FileTransferModals | undefined> =

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("");

src/ViewModel/Pages/boardViewModel.ts

@@ -16,7 +16,7 @@ import TaskViewModel from "./taskViewModel";
 import { CommonKeys } from "../../View/keystrokes";
 
 export default class BoardViewModel extends TaskContainingPageViewModel {
-    contextDebugDescription = "board";
+    contextDebugDescription: string = "board";
 
     // state
     name: React.State<string> = new React.State("");

src/ViewModel/Pages/taskContainingPageViewModel.ts

@@ -11,7 +11,7 @@ import TaskViewModel from "./taskViewModel";
 
 export default class TaskContainingPageViewModel extends Context {
     // state
-    taskIndexManager: IndexManager<TaskViewModel> = new IndexManager(
+    taskIndexManager = new IndexManager<TaskViewModel>(
         (taskViewModel: TaskViewModel) => taskViewModel.sortingString,
     );
 

src/ViewModel/Pages/taskPageViewModel.ts

@@ -11,10 +11,10 @@ import { IndexManager } from "../../Model/Utility/utility";
 import { CommonKeys } from "../../View/keystrokes";
 
 export default class TaskPageViewModel extends ContextHost<string> {
-    contextDebugDescription = "task-page";
+    contextDebugDescription: string = "task-page";
 
     // data
-    boardIndexManager: IndexManager<BoardViewModel> = new IndexManager(
+    boardIndexManager = new IndexManager<BoardViewModel>(
         (boardViewModel: BoardViewModel) => boardViewModel.name.value,
     );
 

src/ViewModel/Utility/taskPropertyBulkChangeViewModel.ts

@@ -19,7 +19,7 @@ export default class TaskPropertyBulkChangeViewModel {
         });
     };
 
-    setValue: (newValue: string, taskViewModel: TaskViewModel) => void;
+    setValue: (newValue: string, taskViewModel: TaskViewModel) => void = () => {};
 
     // init
     constructor(