Move the apply button's function to the value dropdown list in the Group Filter widget?

[DávidGregor]

I'm trying to minimalize this widget totally, but i feel it's not possible to easily add an event listener what fires the the apply button's function (click:setFilterLayerDef). Maybe i'm missing an easy solution.  I'm looking at the js code for hours... 

just for presentation purpose:

    <div class="container" data-dojo-attach-point="filterBlock" data-dojo-attach-event="change:setFilterLayerDef" id="filterBlock">

        <div class="filter-block" data-dojo-attach-point="filterBlockInner" id="filterBlockInner">

            <table id="tblPredicates" class="tableFormat" border=0 cellspacing="0" cellpadding="0"></table>

        </div>

    </div>