Get support for using menus in menus folder

[Jimmi08]

Motivation

Menu manager already displays available menus in menus folder. For example, content plugin generates menus for Main parent categories in menus folder inside the plugin folder It is very handy when you have a complex plugin with more menus and you want to have them organized.

Proposed Solution

Add support for ability to use e_menu for menus folder (configuration).

Now it fails because path for those menus is plugin folder/menus (content/menus) and Menu manager is looking for e_menu: (e_PLUGIN.$row['menu_path']."e_menu.php")

and then

$plug = rtrim($row['menu_path'],'/');
$obj = e107::getAddon($plug,'e_menu');

If you just remove string "menus" from menu_path, it should work. Something like this: $row['menu_path'] = str_replace("menus","",$row['menu_path']);

Thanks

[Jimmi08]

Related: https://github.com/e107inc/e107/issues/4056