Update ContainerListItem css so action buttons are no longer wrapping (#3697)

styles/left-panel.less

@@ -148,6 +148,7 @@
         }
         .info {
           margin-left: 1rem;
+          max-width: 120px;
           .name {
             text-overflow: ellipsis;
             max-width: @sidebar-text-overflow-width;
@@ -167,6 +168,9 @@
             white-space: nowrap;
             overflow: hidden;
           }
+          span {
+            display: inline-block;
+          }
         }
         .action {
           display: block;