made pin boxes and fonts bigger for mobile
made checkbox bigger on mobile
made connection endpoints bigger on mobile
made labels in settings have font weight normal
made the loading screen font match the rest of the app
made analog sensor slider handles bigger on mobile
ng-repeat iterates over d.visible_sensors and d.visible_actuators as if they are lists, which they are, not as if they are dictionaries. i think i had already made it so that nobody was using that id (which would be wrong) anyway so it's fine
added background message for when there are no pins in play mode