Leave the presets out of Visual in the phone's More sheet

The More sheet already shows the dock's Visual Presets tray right above
Visual, so the panel's own copy is hidden on the phone shell.

Co-authored-by: Manjunath Paparaju <[email protected]>

src/ui/styles/visual-panel.css

@@ -123,6 +123,12 @@
   cursor: default;
 }
 
+/* The phone's More sheet shows the dock's Visual Presets tray right above
+   Visual, so the panel leaves out its own copy there. */
+body.mobile-shell #pp-toggles .visual-presets {
+  display: none;
+}
+
 /* The body is display: contents, so its children are the panel's own flex
    items: keep them full width and unshrunk. */
 #pp-toggles .pp-panel-body > * {