#3417335 - Fixed stylelint errors in css file.

Closes #3417335

css/gridstack-base.css

 .grid-stack {
-  background-color: #ebebeb;
   min-height: 1em;
+  background-color: #ebebeb;
 }
 
 .grid-stack-item-content {
@@ -33,8 +33,8 @@
 .paragraphs-gridstack-actions-container {
   position: relative;
   display: flex;
-  justify-content: space-between;
   flex-wrap: wrap;
+  justify-content: space-between;
   width: 100%;
 }