Help button doesn't work

[mizmay]

Summary

When click the ? button, nothing displays (except grey text that says "Need a little help?")

Expected Behavior

I'd expect to see instructions for how to use BBoxFinder

Additional Details

this is not a regression caused by #50, also broken in production.

Screenshots

Proposed solutions

1. Remove the help button
2. Write or revise and link instructions to display in the help box

[mizmay]

See #17 for the add help document option