Replace subcategories dropdown with EasyCatalogImages widget

Result:

1. Navigate to NavigationPro backend interface and select menu to edit
2. Open “Dropdown columns” tab and change Mode to “Custom”
3. Remove Subcategories column and add new column with following values:

Type:                Widget or Plain Html
Content:             Insert EasyCatalogImages widget by using "Insert widget" button in WYSIWYG editor
Width:               800
Show Detailed Configuration: Yes
Css Styles:          padding: 10px 0;