first version
add LineEdit with device path and fix key press event handling
add text area
set initial geometry
don't send special commands when special key is the only one pressed
add sketch
cleanup communication protocol
implement scanning
add .settings to .gitignore
add "stop scanning" action
disable angle spinboxes while in scanning
join connect and disconnect buttons into one
scale resulting image on the fly
fix labels
add save image button
handle sensor transmission errors
enable debug build
configure port
implement device "locking"
split image handling to its own class