fix styling for progressbar (fix #7362)
fix styling for progressbar (fix #7362)

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