Support for Bootstrap 4

[gustawdaniel]

In bootstrap 4 filtering looks like this

This is because lack of backward compatibility between bootstrap.

Following after docs

https://getbootstrap.com/docs/4.0/components/button-group/

New code of filter should looks like this

<div id="datatable-editable-filter" class="input-group">
            <div class="input-group-prepend">
                <div class="input-group-text">
                    <i class="fa fa-filter"></i>
                </div>
            </div>
            <input class="reactive-table-input form-control" type="text" placeholder="Filter">
        </div>

Now code looks like this and works in bootstrap 3.

<div id="datatable-editable-filter" class="input-group">
    <span class="input-group-addon">
        <i class="fa fa-filter"></i>
    </span>
        <input class="reactive-table-input form-control" type="text" placeholder="Filter">
  </div>

I propose add number of bootstrap to config and in dependence of this change code.

Now I applied hack:

document.querySelector('#datatable-editable-filter span.input-group-addon').outerHTML = `
             <div class="input-group-prepend">
                <div class="input-group-text">
                    <i class="fa fa-filter"></i>
                </div>
            </div>
`