add compatibility for restore of early settings backup versions
add compatibility for restore of early settings backup versions

tobiasge/cgeo,cgeo/cgeo,S-Bartfast/cgeo,auricgoldfinger/cgeo,cgeo/cgeo,S-Bartfast/cgeo,matej116/cgeo,matej116/cgeo,rsudev/c-geo-opensource,rsudev/c-geo-opensource,S-Bartfast/cgeo,auricgoldfinger/cgeo,rsudev/c-geo-opensource,matej116/cgeo,auricgoldfinger/cgeo,tobiasge/cgeo,cgeo/cgeo,cgeo/cgeo,tobiasge/cgeo