[proposal] Expose $container to the selectAll/deSelectAll callbacks

[ghost]

The idea is to be able to do stuff on children of the container in the callback.

NB: I wasn't able to run the tests locally (I don't know how)

[davidstutz]

Not sure about the use case here ...

[ghost]

Will update tomorrow (GMT+2) with details on the use case. Thanks.

[ghost]

We use some custom icons for everything including checkboxes and radios. In order to style the checkboxes/radios in the multiselect I need the container to do:

onInitialized: function(select, container) {
    // caret icon
    $(container).find(".caret").removeClass("caret").addClass("xxxx-angle-down");

    // custom checkboxes
    $(container).find(".checkbox").addClass("xxxx-checkbox");

    // custom radios
    $(container).find(".radio").addClass("xxxx-radio");
},
onDropdownShow: function(event) {
    // reset
    $(event.currentTarget).find("li").find(".xxxx-checkbox,.xxxx-radio").removeClass("checked");

    // add checked class
    $(event.currentTarget).find("li.active").find(".xxxx-checkbox,.xxx-radio").addClass("checked");
},
onSelectAll: function(container, checked) {
    // reset
    $(container).find("li").find(".xxxx-checkbox,.xxxx-radio").removeClass("checked");

    // add checked class
    $(container).find("li.active").find(".xxxx-checkbox,.xxxx-radio").addClass("checked");
}