Add missing space

Signed-off-by: Michal Čihař <michal@cihar.com>
Add buton icon

Signed-off-by: Michal Čihař <michal@cihar.com>
Document another change

Signed-off-by: Michal Čihař <michal@cihar.com>
Add sample settings to docs

Signed-off-by: Michal Čihař <michal@cihar.com>