ANNOUNCE: Renaming user-visible strings

[Samuel Mehrbrodt]

Someone from the help team approached the design team [1] about how to 
handle string changes in LibreOffice.
The problem is that when we change user-visible strings in LibreOffice, 
that the help and other documentation needs updating.

We decided to create a wiki page which lists all string changes we do: 
https://wiki.documentfoundation.org/Documentation/RecentStringChanges

So please, if you change some user-visible string whether it's in a 
menu, toolbar or a dialog, just list your change there so that the help 
maintainers can easily update the help pages.

Thanks!
Samuel

[1] https://redmine.documentfoundation.org/boards/1/topics/180