improve UI

src/ViewModel/Global/coreViewModel.ts

@@ -52,12 +52,23 @@ export default class CoreViewModel {
         )
             return;
 
+	let exitNext: boolean = false;
+
         while (this.contexts.length > 0) {
             const currentContext: Context | undefined = this.context;
             if (!currentContext) return;
-            currentContext.handleContextClose(fromHistoryEvent);
+            const response = currentContext.handleContextClose(fromHistoryEvent);
+	    if (response == false) return;
             this.contextStack.delete(currentContext.contextId);
-            if (currentContext.contextId == contextId) break;
+	    if (response == true) {
+		exitNext = true;
+		continue;
+	    } else if (exitNext == true) {
+		break
+	    }
+	    else if (currentContext.contextId == contextId) {
+		break;
+	    }
         }
     };
 
@@ -196,7 +207,7 @@ export class Context {
     };
 
     close = (): void => {};
-    handleContextClose = (fromHistoryEvent: boolean): void => {};
+    handleContextClose = (fromHistoryEvent: boolean): void|boolean=> {};
 
     registerKeyStroke = (key: string, fn: () => void): void => {
         this.keystrokes.set(key, fn);