tdf#148941 changed label from "Text" -> "Text Alternative" as part of
making consistent usage across the UI. This patch updates the
relevant help file. Also, introduces a variable for a sentence that
is repeated across several options, and which uses the new label.
This makes it possible to use <embedvar> instead of retranslating the
same sentence with the label change.
Change-Id: I3be6a3863f74790732682abd8228c47cd907b0b7
Reviewed-on: https://gerrit.libreoffice.org/c/help/+/136044
Tested-by: Jenkins
Reviewed-by: Seth Chaiklin <sdc.blanco@youmail.dk>
345a9ecdd1