load new project, both json and title; set title on file load; draft of code to fetch title from api

* added account navigation menu, copied and adapted from www

* fixed css

* support for login menu, registration menu from www

* Dropdown replaced with MenuBarMenu, override www css in menus

* render and style login dropdown via function from www

* moved menu styling from menu itself to menu bar

* refactoring menu components and containers

* refactor and restyle account nav menu

* cleaned up cruft and css per rschamp's review of PR 3070

styling for title field; correct input target in tests; make download filename safer with default, max length; in playground index, correctly pass props through to gui container

Unfortunately I couldn't do the same with loading projects, since the presence of the component (necessitating the menu to be open) allows the actual upload from file to work, since it needs the FileInput component to be present, so it can emit a change event.  We should revisit

Overlay a transparent `select` over the language icon. When a user clicks there the options pops up. There’s no styling of the options, other than font and font size.

This reverts commit 1c20d6db, reversing
changes made to 2f1cce93.

Note: the coming soon tooltip positions are calculated by react-tooltip, and they do not handle RTL.

HT @paulkaplan