* homepage and support pages stackoverflow changes

* typography changes for readme section

* initial dropdown styling

* code cleanup for dropdown component

* further code cleanup for dropdowns

* added comments

* new loading page

* code mirror background colour change

* select state in code mirror colour change

* table heading spacing change and transaction button alignment fix

* header padding changes

* notification typography changes

* minor updates to the code section styling in the docs.

* new 404 page and styles + homepage callout width fix

* typography fix for side-nav

* button svg spacing and colour fixes

* jsdoc readme fix

* support page fix

* support page new name

* async fix for loading copy button

* conref fix in query docs

* playground tutorial ACL fix, sample network default update