Widget sizing

[forgetso]

Widget Style fixes

This PR adds container CSS to the widget so that it resizes depending on the size of its parent div, and not the size of the screen. Contains the following changes:

• resizing based on container breakpoints
• creates common logo components for the various widgets
• updates the procaptcha widget
• updates the procaptcha POW widget
• updates the placeholder widget
• adds detail to the README for server side verification
• adds the collector config to the development client-example
• adds a command for starting the POW demo
• adds a sleep to the occasionally failing utility test
• fixes the URL in the widget and pulls it into a constants file
• adds various other constants to widget constants file
• fixes a bug relating to events when the provider URL is not present in local storage

Screenshots

Video of breakpoints

[forgetso]

Tested on mobile

Stale