Handle Search of second list with a custom callback function

[luisloaiza]

Inside

handleSearchUpdate(term)

We need to handle the new list of search of users , we can pass a function so the developer can handle the search pretty well.

Currently we are working with a hack using window.seachFunctionexposed and is an ASYNC function. In that function we are obtaining user data from a 3rd party service that will be used to create conversations.