AMBARI-3890. Background operations: two scrollbars, if width is lower then 1450px (Denys Buzhor via alexantonenko)

ambari-web/app/styles/application.less

@@ -1059,6 +1059,7 @@ a:focus {
     width: 60%;
     margin: 0 0 0 -30%;
     max-height: 544px;
+    min-width: 590px;
     top: 5%;
   }
   .long-popup-list {