feat(tgui): automatically hide scrollbars from UIs that don't need them

TGUI bundles were rebuilt to apply changes.

This commit is based on Aylong's PR for Paradise Station:
ParadiseSS13/Paradise#26433

Author: rufuszero

tgui/packages/tgui/styles/layouts/Layout.scss

@@ -61,6 +61,6 @@ body {
 }
 
 .Layout__content--scrollable {
-  overflow-y: scroll;
+  overflow-y: auto;
   margin-bottom: 0;
 }