[gimp-web] Explain how to disable tool groups too

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 7086fb2643f0c4dc4072f8032799e6f8c30222f5
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Tue Apr 26 17:31:24 2022 +0000

    Explain how to disable tool groups too

 content/docs/userfaq.md | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/content/docs/userfaq.md b/content/docs/userfaq.md
index 8506a801..0b86a9b1 100644
--- a/content/docs/userfaq.md
+++ b/content/docs/userfaq.md
@@ -159,14 +159,19 @@ by Richard Gaywood.
 ### I do not recognize GIMP's user interface. It's different from what I see in all tutorials. What do I do?
 
 We switched to a dark user interface theme and a symbolic icon theme by default
-in version 2.10. If you absolutely want to revert it, here is what you do:
+in version 2.10, we also introduced tool groups. If you absolutely want to revert
+GIMP to colorful icons, bright/system user interface, and no tool groups, here is
+what you do:
 
-Go to `Edit > Preferences > Interface > Theme` and change the theme from _Dark_
-to _System_.
+1. Go to `Edit > Preferences`, in the newly opened window go to `Interface > Theme`
+and change the theme from _Dark_ to _System_.
 
-Then go to `Edit > Preferences > Interface > Icon Theme` and change the theme
+2. Switch to the `Interface > Icon Theme` page nearby and change the theme
 from _Symbolic_ to _Legacy_.
 
+3. Finally, go to `Interface > Toolbox` in the very same _Preferences_ dialog and
+tick off the _Use tool groups_ setting.
+
 Changes will apply immediately. Click _OK_ to confirm.
 
 ### When will GIMP support HDR imaging and processing with 16bit per color channel precision?