integrate context with window.history API

src/ViewModel/Global/fileTransferViewModel.ts

@@ -164,11 +164,15 @@ export default class FileTransferViewModel extends Context {
         this.coreViewModel.fileTransferModel.prepareToReceive(transferData);
     };
 
-    hideModal = (): void => {
+    // exit
+    close = (): void => {
         this.coreViewModel.closeContext(this.contextId);
-        this.presentedModal.value = undefined;
     };
 
+    handleContextClose = (): void => {
+        this.presentedModal.value = undefined;
+    }
+
     // init
     constructor(public readonly coreViewModel: CoreViewModel) {
         super("file-transfer");
@@ -184,7 +188,7 @@ export default class FileTransferViewModel extends Context {
         );
 
         // keystrokes
-        this.registerKeyStroke(CommonKeys.CloseOrCancel, this.hideModal);
+        this.registerKeyStroke(CommonKeys.CloseOrCancel, this.close);
     }
 }