Fix workspace shell settings

Fixes #26178

src/vs/workbench/parts/terminal/electron-browser/terminalConfigHelper.ts

@@ -141,14 +141,12 @@ export class TerminalConfigHelper implements ITerminalConfigHelper {
 			const message = nls.localize('terminal.integrated.allowWorkspaceShell', "Do you allow {0} (defined as a workspace setting) to be launched in the terminal?", changeString);
 			const options = [nls.localize('allow', "Allow"), nls.localize('disallow', "Disallow")];
 			this._choiceService.choose(Severity.Info, message, options, 1).then(choice => {
-				switch (choice) {
-					case 0:
-						this._storageService.store(IS_WORKSPACE_SHELL_ALLOWED_STORAGE_KEY, true, StorageScope.WORKSPACE);
-					case 1:
-						this._storageService.store(IS_WORKSPACE_SHELL_ALLOWED_STORAGE_KEY, false, StorageScope.WORKSPACE);
-					default:
-						return TPromise.as(null);
+				if (choice === 0) {
+					this._storageService.store(IS_WORKSPACE_SHELL_ALLOWED_STORAGE_KEY, true, StorageScope.WORKSPACE);
+				} else {
+					this._storageService.store(IS_WORKSPACE_SHELL_ALLOWED_STORAGE_KEY, false, StorageScope.WORKSPACE);
 				}
+				return TPromise.as(null);
 			});
 		}