[reSIProcate] Minor point: passing shared pointers

[Alan Stokes <alan@xxxxxxxxxxxxxxxxx>]

There are fair number of places in the code where SharedPtrs are being
passed by reference, when actually const reference would be more
appropriate. For example DialogUsageManager.hxx has
      void setMasterProfile(SharedPtr<MasterProfile>& masterProfile);
instead of
      void setMasterProfile(SharedPtr<MasterProfile> const & masterProfile);

(You aren't going to modify my copy of the SharedPtr, only make your own copy of it.) 

I came across this because I tend to make absolutely everything I can
const - and if I have a const SharedPtr I can't pass it to one of these
functions. 

- Alan