feat: display number of files for 'Files' view (#2065)

* feat: display number of files for 'Files' view

* feat: include files count in Preferences > Security

packages/snjs/lib/Application/Application.ts

@@ -1383,7 +1383,7 @@ export class SNApplication implements ApplicationInterface, AppGroupManagedAppli
   }
 
   private createItemManager() {
-    this.itemManager = new InternalServices.ItemManager(this.payloadManager, this.options, this.internalEventBus)
+    this.itemManager = new InternalServices.ItemManager(this.payloadManager, this.internalEventBus)
     this.services.push(this.itemManager)
   }
 

packages/snjs/lib/Application/Options/Defaults.ts

@@ -1,11 +1,9 @@
-import { ApplicationDisplayOptions, ApplicationSyncOptions } from './OptionalOptions'
+import { ApplicationSyncOptions } from './OptionalOptions'
 
 export interface ApplicationOptionsWhichHaveDefaults {
   loadBatchSize: ApplicationSyncOptions['loadBatchSize']
-  supportsFileNavigation: ApplicationDisplayOptions['supportsFileNavigation']
 }
 
 export const ApplicationOptionsDefaults: ApplicationOptionsWhichHaveDefaults = {
   loadBatchSize: 700,
-  supportsFileNavigation: false,
 }

packages/snjs/lib/Application/Options/OptionalOptions.ts

@@ -5,9 +5,8 @@ export interface ApplicationSyncOptions {
   loadBatchSize: number
 }
 
-export interface ApplicationDisplayOptions {
-  supportsFileNavigation: boolean
-}
+// eslint-disable-next-line @typescript-eslint/no-empty-interface
+export interface ApplicationDisplayOptions {}
 
 export interface ApplicationOptionalConfiguratioOptions {
   /**