Out-of-date image in Intro.lyx

[Pavel Sanda]

On Wed, Aug 23, 2023 at 09:03:57PM +0200, Dan wrote:
> Hello,
> 
> I have found an out-of-date image in the English version of Intro.lyx: the appearance of the footnotes in the Lyx editor view (https://www.lyx.org/trac/browser/lyxgit/lib/doc/Intro.lyx#L1048).Footnotes are no longer displayed like that (https://www.lyx.org/trac/browser/lyxgit/lib/doc/clipart/footnote.png) but rather as a superscript number in an inset.

I am happy to commit the fix if you can prepare the patch....
Pavel