Update MenuFlags to work as expected

* 'popParent' has been removed
* 'noHistory' now works as expected
* Mods that explicitly want noHistory can state such in their constructor()

core/file_area_list.js

@@ -2,10 +2,8 @@
 'use strict';
 
 //  ENiGMA½
-const MenuModule = require('./menu_module.js').MenuModule;
-const ViewController = require('./view_controller.js').ViewController;
+const { MenuModule, MenuFlags } = require('./menu_module.js');
 const ansi = require('./ansi_term.js');
-const theme = require('./theme.js');
 const FileEntry = require('./file_entry.js');
 const stringFormat = require('./string_format.js');
 const FileArea = require('./file_base_area.js');
@@ -77,6 +75,8 @@ exports.getModule = class FileAreaList extends MenuModule {
         this.fileList = _.get(options, 'extraArgs.fileList');
         this.lastFileNextExit = _.get(options, 'extraArgs.lastFileNextExit', true);
 
+        this.setMergedFlag(MenuFlags.NoHistory);
+
         if (this.fileList) {
             //  we'll need to adjust position as well!
             this.fileListPosition = 0;