adjust the size of 'column-header__back-button' (retry) (#3662)

app/javascript/styles/components.scss

@@ -1527,7 +1527,7 @@
   cursor: pointer;
   flex: 0 0 auto;
   font-size: 16px;
-  padding: 0 5px 0 0;
+  padding: 15px;
   z-index: 3;
 
   &:hover {
@@ -1543,7 +1543,7 @@
   cursor: pointer;
   flex: 0 0 auto;
   font-size: 16px;
-  padding: 0 15px;
+  padding: 0 5px 0 0;
   z-index: 3;
 
   &:hover {