mentoring for Sidebar customization settings

[Laurent Godard]

Hi all

I would like to have a look at
https://bugs.documentfoundation.org/show_bug.cgi?id=67770

--> CONFIGURATION: Sidebar customization settings not remembered after 
reopening

I'll first have a look at the global settings, application level based 
as they are actually loaded from the registry

Then, i would like to set this per file as a customization is highly 
dependant from the context we use it (one may need different settings on 
different files).
Any advice on this is welcommed

also any mentor volunteer to review my job and helping me on some 
starting points is welcome

thanks in advance

Laurent