Don't reset the extensions' settings on every refresh

gnome-extensions.sh loaded gnome-settings.dconf unconditionally, so each
refresh (install.sh runs it) undid users' changes to those settings,
bypassing apply-gnome-settings.sh's check that the file has changed. That
script, which install.sh runs later, already loads the settings when
needed. The smoketest's 11-refresh caught it: Tiling Shell's
selected-layouts went back to the file's value.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

gnome/gnome-extensions.sh

@@ -28,5 +28,6 @@ for ext in "${EXTENSIONS[@]}"; do
   echo "  Installed and enabled: $ext"
 done
 
-# Load settings from dconf file
-dconf load /org/gnome/shell/extensions/ < "$SCRIPT_DIR/gnome-settings.dconf"
+# The extensions' settings (gnome-settings.dconf) are loaded by
+# apply-gnome-settings.sh, which install.sh runs later, and only when the file
+# has changed. Loading them here too reset users' own changes on every refresh.