Feature request: Ability to add url parameters into admin actions in menu.xml

[nbgrommet]

Currently it is not possible to have an admin menu link with more than 3 arguments:

menu.xml:

...

<add
id="Module::module_name-id"
action="module/controller/action/paramFoo/valueBar"
.../>

is menu item link is truncated to: 'module/controller/action/' and ignores the 'paramFoo/valueBar' addition. 

I'd suggest adding another property to the <add tag, something like:

actionParams="paramFoo=valueBar&paramLorem=valueIpsum" 

which would then be added to the $params array in the Magento\Backend\Model\Menu\Item::getUrl() method.