title: ui-select : set width in Bootstrap grid system
body: <p>I have a form with a ui-select in a bootstrap grid.
  I want my ui-select to be as wide as the input below it.
  Here is my code </p>
  
  <pre><code>&lt;div class="col-md-12"&gt;
     &lt;div class="col-md-6 form-group"&gt;
          &lt;label class="col-md-4" style="text-align:right;"&gt;Pays&lt;/label&gt;
          &lt;div class="col-md-8"&gt;
              &lt;ui-select ng-model="adresse.pays" theme="select2" ng-disabled="disabled" ame="pays"&gt;
                  &lt;ui-select-match placeholder="Sélectionnez un pays..." allow-clear&gt;{{$select.selected.nom}}&lt;/ui-select-match&gt;
                  &lt;ui-select-choices repeat="pays in payss | propsFilter: {nom : $select.search}"&gt;
                      &lt;div ng-bind-html="pays.nom | highlight: $select.search"&gt;&lt;/div&gt;
                  &lt;/ui-select-choices&gt;
              &lt;/ui-select&gt;
          &lt;/div&gt;
      &lt;/div&gt;
      &lt;div class="col-md-6"&gt;
          &lt;label class="col-md-4" style="text-align:right;"&gt;Mail&lt;/label&gt;
          &lt;input type="text" class="col-md-3 input-sm"
              ng-model="adresse.mail"&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  &lt;div class="col-md-12"&gt;
      &lt;div class="form-group col-md-6"&gt;
          &lt;label class="col-md-4" style="text-align:right;"&gt;Code adresse client&lt;/label&gt;
          &lt;input type="text" class="col-md-8 input-sm"
              ng-model="adresse.codeAdresseClient" name="codeAdresse"&gt;
      &lt;/div&gt;
      &lt;div class="form-group col-md-6"&gt;
          &lt;label class="col-md-4" style="text-align:right;"&gt;Interlocuteur&lt;/label&gt;
          &lt;input type="text" class="col-md-3 input-sm"
              ng-model="adresse.interlocuteur" name="interlocuteur"&gt;
      &lt;/div&gt;
  &lt;/div&gt;  
  </code></pre>
  
  <p>This code produces this:
  <img src="https://i.stack.imgur.com/yvvOo.png" alt="enter image description here"></p>
  
  <p>If someone knows how to do that...
  Thanks in advance.</p>