Apply KDE code style to sound library and main code

src/charts/sorting.cpp

src/charts/sorting.h

src/charts/tbarchart.cpp

src/charts/tbarchart.h

src/charts/tbarchartdelegate.cpp

src/charts/tbarchartdelegate.h

src/charts/tchart.cpp

src/charts/tchart.h

src/charts/tchartitem.cpp

src/charts/tchartitem.h

src/charts/tcharttipitem.cpp

src/charts/tcharttipitem.h

src/charts/tgroupedqaunit.cpp

src/charts/tgroupedqaunit.h

src/charts/tlinchartdelegate.cpp

src/charts/tlinchartdelegate.h

src/charts/tlinearchart.cpp

src/charts/tlinearchart.h

src/charts/tmainchart.cpp

src/charts/tmainchart.h