perf: don't fetch font details we don't use ...

[mmeeks]

With the Notebookbar - and perhaps wiht the new font drop-down it seems we don't really use the result of this (very large) JSON we fetch: at least if this code changes get in: https://gerrit.libreoffice.org/c/core/+/167799

Then with something like this:

--- a/kit/SetupKitEnvironment.hpp
+++ b/kit/SetupKitEnvironment.hpp
@@ -46,7 +46,7 @@ inline void setupKitEnvironment(const std::string& userInterface)
}

 // Set various options we need.

• std::string options = "unipoll";

• std::string options = "unipoll:compact_fonts";
  if (userInterface == "notebookbar")
  options += ":notebookbar";

We can enable a very much smaller message with all the font details in it - but even so, we shouldn't fetch that if we don't need it in the
Notebookbar case surely (?).

@eszkadev can you think a bit on this and work out how best to handle this to be more efficient ? I'd guess step 1 - enable and switch to the new format in the UI if that's do-able, and step 2 - turn it off except for old-style toolbar ? =)

Thanks!