move overview keys into Metric model
just use a simple if/else instead of begin/rescue
add network bytes to overviews
remove network packets
change to 4-col display on lg screens
move helper methods into external files
remove some navbar padding
docs
add extra selector to inventory metadata popover
added context-sensitive help for metrics
make sure to update config after deleting a check
added a help button to the navbar (for page-level help)
make sure 'help' is a string
focus on whichever field is displayed
added restful otp validation logic
added help text for all pages