Updated core

Project: help  8bca37f6c6f708fc5f8c1eb4938648e4f5324d4c

Replace icontable by div + CSS flexbox

Icon tables are detected when the first cell has an image.

Change-Id: I808c814870404dbef696e12c6f30a7611468d2ee
Reviewed-on: https://gerrit.libreoffice.org/53429Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

helpcontent2 @ 8bca37f6

-Subproject commit 3824ac08e61a8f41fde588fd3b6408dec8c244c5
+Subproject commit 8bca37f6c6f708fc5f8c1eb4938648e4f5324d4c