Adding an infobar to calc

[Samuel Mehrbrodt]

Cédric helped me on IRC so no need to answer anymore here.

Am 27.08.2014 um 00:15 schrieb Samuel Mehrbrodt:
> Hi,
>
> I'm working on fdo#80538 
> <https://bugs.freedesktop.org/show_bug.cgi?id=80538> (adding an 
> infobar when document is in read-only mode).
> With the attached patch the infobar is shown when you enable the 
> non-edit mode via toolbar, but I can't get the button to leave 
> read-only mode in there.
>
> Can someone give me a hint what's wrong with my code?
>
> Thanks
> Samuel