Add signal testing of all variables
this commit contains all qPref* that work directly
followup commit will do changes to qPref* to make signals work
Signed-off-by: Jan Iversen <jani@apache.org>
Remove TechnicalDetails test in testpreferences
add the same TechnicalDetails tests to testqPrefTechnicalDetails
Signed-off-by: Jan Iversen <jani@apache.org>