Fix get current page

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>
remove old GtkNotebook

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>
add missing __main__.py

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>
dev.sh --reinstall

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>