GPII-164: fixed focus issue

Fixed the issue where disabling one of the contrast presets made it lose focus. Now only calling refershView on the preset when it has been disabled by its counterpart preset.
Merge branch 'master' into GPII-164
Merge remote-tracking branch 'jobara/GPII-164'

* jobara/GPII-164:
  GPII-164: fixed focus issue