added a symbol on the main button

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
don't show vertices below a minimum coverage

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
add/remove stuff dynamically with coverage threshold

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
added Ray Cloud Browser in one corner

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
fixed height in full-screen mode

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>