Improve margins between buttons at bootstrap theme

Author: dimirc

src/bootstrap/match-multiple.tpl.html

@@ -1,6 +1,7 @@
 <span class="ui-select-match">
   <span ng-repeat="$item in $select.selected">
     <button 
+      style="margin-right: 3px;"
       class="btn btn-default btn-xs" 
       tabindex="-1" 
       ng-disabled="$select.disabled"