Tooltips after one second, and at once for the next button

From the development repository at b7ffe0e.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/guest.md

@@ -53,7 +53,7 @@ groups: on the left the tools, their settings and **Undo**; in the
 middle the page and the view; on the right the host's page buttons,
 **Notebooks**, your notebook, and **Session**, which opens a window with
 the participants and the invitation.  Below it the page has the whole width of the window.  Every button
-explains itself: rest the pointer on it for two seconds and its
+explains itself: rest the pointer on it for a second and its
 explanation appears beneath it.
 
 ### The page