Fixed an incorrect label for NVDA.
Fixing the way we match with some nested parameters

Basically the issue is that nested preferences should be accessed by
using the aa\\.bb\\.yy way instead of the [aa][bb][cc] one.
Showing errors on STMM's preferences processing process (if any)
Merge pull request #1 from javihernandez/optec_pilot_1

Fixing the way we match with some nested parameters
Added handcrafted fallbacks for preferences/settings which are not included in the datasets and no relations are found.
Added a manual fallback for gnome gtk-highcontrast.
Merge branch 'pilot' into Optec/pilot
Merge branch 'Optec/pilot' into pilot

* Optec/pilot:
  Added a manual fallback for gnome gtk-highcontrast.
  Added handcrafted fallbacks for preferences/settings which are not included in the datasets and no relations are found.
  Showing errors on STMM's preferences processing process (if any)
  Fixing the way we match with some nested parameters
  Fixed an incorrect label for NVDA.