AMBARI-11243. Remove-icon for overrides has "button"-style (alexantonenko)

ambari-web/app/styles/application.less

@@ -1208,7 +1208,7 @@ h1 {
       margin-right: 2px;
     }
     .btn-final{
-      background: none repeat scroll 0 0 #fff;
+      background: transparent repeat scroll 0 0 rgba(255, 255, 255, 0);
     }
     .btn-final .icon-lock{
       color: #a6a6a6;

ambari-web/app/templates/common/configs/overriddenProperty.hbs

@@ -43,7 +43,7 @@
           </a>
         {{/if}}
         {{#isAccessible ADMIN}}
-          <a class="btn btn-small" href="#" data-toggle="tooltip"
+          <a class="btn-small" href="#" data-toggle="tooltip"
             {{action "removeOverride" overriddenSCP target="view"}}
             {{translateAttr data-original-title="common.remove"}}>
             <i class="icon-minus-sign"></i>