fix(plugins/plugin-client-common): ls ; ls has excessive vertical whitespace

Fixes #6291

Author: starpit

plugins/plugin-client-common/web/css/static/repl.scss

@@ -174,6 +174,10 @@ body[kui-theme-style] .kui--repl-block-right-element {
 
   .repl-output {
     .repl-result {
+      &.flex-column {
+        /* see https://github.com/IBM/kui/issues/6291 */
+        flex-wrap: nowrap;
+      }
       pre:empty {
         display: none;
       }