[REVIEW][3-5] Header/Footer and PageBreak indicators to be hidden in RO mode

[Cedric Bosdonnat]

Hi all,

Could someone (kendy?) review and cherry-pick -s in -3-5 the following
commit:
http://cgit.freedesktop.org/libreoffice/core/commit/?id=beb8a85796c78d4cdcf6497b6725fce8f7141d75

A bug was also recently filed that is fixed by this one: 
https://bugs.freedesktop.org/show_bug.cgi?id=45548

Thanks,

--
Cedric