🐛 Fix scroll on token themes modal (#6251)

* 🐛 Fix scroll on token themes modal

* 🐛 Fix collapse set group error

frontend/src/app/main/ui/workspace/tokens/modals/themes.scss

@@ -190,6 +190,7 @@
   border: $s-1 solid color-mix(in hsl, var(--color-foreground-secondary) 30%, transparent);
   border-radius: $s-8;
   overflow-y: auto;
+  max-height: $s-452;
 }
 
 .sets-count-empty-button {

frontend/src/app/main/ui/workspace/tokens/sets.cljs

@@ -171,6 +171,7 @@
         on-collapse-click
         (mf/use-fn
          (fn [event]
+           (dom/prevent-default event)
            (dom/stop-propagation event)
            (on-toggle-collapse tree-path)))