title: How to use gridfilters Plugin AND programmatically clear/set the filters?
body: <p>In my app (ExtJS 5.0.1) I'm trying to use a grid with the gridfilters Plugin AND shortcut buttons (and also from a tree) with custom/hardcoded fiters.</p>
  
  <p>I was able to partially mimic the set and clear of the filters, but I'm having the following problems:</p>
  
  <p>1- When I set a filter via <code>grid.filters.store.addFilter(..)</code> the style of the column title doesn't change to bold, and the grid filter checkbox stays unchecked.</p>
  
  <p>2- Same as 1 but reversed... first I set the filter on the column, when I clear the filter the column stays bold, but in this case the checkbox is cleared (as it should).</p>
  
  <p>3- When I'm using summary feature 'sometimes' the total is not updated</p>
  
  <p>So, my question is:
  Is there a proper way to programmatically set/clear filters mimicking the gridfilter Plugin ?</p>
  
  <p>I've put a minimal Fiddle to simulate this.</p>
  
  <p><a href="https://fiddle.sencha.com/#fiddle/akh" rel="nofollow">https://fiddle.sencha.com/#fiddle/akh</a></p>
  
  <p>Best Regards,
  Ricardo Seixas</p>