RepoBrowser: Show executable overlay icon

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
RepoBrowser: Show symlink overlay icon

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Can set symlink in Shell Property Page

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>