Updated core

Project: help  7d7b5977dd278ac994a09f935ba43684cdab199a

Replace note,tip,warning with CSS flexbox

Replace <table> by <div>'s with CSS flexbox property.
Independent CSS classes for each div for easier tweaking

Change-Id: Idedcebc7d9d7b28738c25f4fe11314209e92576c
Reviewed-on: https://gerrit.libreoffice.org/53427Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

helpcontent2 @ 7d7b5977

-Subproject commit d5e4c4c48f6d132ee8e4c48c804809ec44e376f6
+Subproject commit 7d7b5977dd278ac994a09f935ba43684cdab199a