fix ellipsis in firefox 55 (#11839)

* fix #11815

* move arrow out of text

* Update UI tests

plugins/CoreHome/angularjs/siteselector/siteselector.directive.less

@@ -55,10 +55,15 @@
   width: 100%;
 }
 
-.siteSelector a.title {
+.siteSelector.piwikSelector a.title {
+  padding: 11px 30px 10px 19px;
+
+  .icon:not(.icon-fixed) {
+    margin-right: -11px;
+  }
+
   > span {
     max-width: 161px;
-    display: inline-block;
     overflow: hidden;
     text-overflow: ellipsis;
   }