Reduce margin/padding on flex-list items and divider (#27872) (#27874)

Backport #27872 by @silverwind

Small CSS tweak, reduces margin/padding from 14px to 10px, which I think
looks better

web_src/css/modules/divider.css

@@ -1,5 +1,5 @@
 .divider {
-  margin: 1rem 0;
+  margin: 10px 0;
   height: 0;
   font-weight: var(--font-weight-medium);
   text-transform: uppercase;
@@ -15,7 +15,7 @@
 .divider.divider-text {
   display: flex;
   align-items: center;
-  padding: 7px 0;
+  padding: 5px 0;
 }
 
 .divider.divider-text::before,

web_src/css/shared/flex-list.css

@@ -6,7 +6,7 @@
   display: flex;
   gap: 8px;
   align-items: flex-start;
-  padding: 1em 0;
+  padding: 10px 0;
 }
 
 .flex-item .flex-item-leading {