title: Filtering for serverside options in combo
body: <p>I'm setting options in the webix combo widget as URL:</p>
  
  <pre><code>webix.ui({
    rows:[
      { 
        view:"combo", 
        options:"https://api.myjson.com/bins/c81ir" // test link
      }
    ]
  });
  </code></pre>
  
  <p>URL returns static JSON. But as I can see, if options are set as URL, it triggers also the server-side filtering:</p>
  
  <pre><code>Request URL:https://api.myjson.com/bins/c81ir?filter[value]=The
  </code></pre>
  
  <p>And in my case such filtering does nothing.</p>
  
  <p>Is it possible to avoid that or should I load options in the separate AJAX call?</p>