This makes all the various hits done by login report the same
useful error messages and gets rid of the broken ones like printing
the http status code even if it was undefined. Also add text for
the case of overzealous browser extensions because lots of people
get bitten by it.
This makes the following changes:
- Improve CountryDropdown by allowing all countries to be displayed at once and using PNGs for performance (trading of quality - the pngs are scaled down from 32px to 25px)
- "I want to sign in with" dropdown to select login method
- MXID login field that suffixes HS domain (whether custom or matrix.org) and prefixes "@"
- Email field which is secretly the same as the username field but with a different placeholder
- No more login flickering when changing ServerConfig (!) fixes https://github.com/vector-im/riot-web/issues/1517
This implements most of the design in https://github.com/vector-im/riot-web/issues/3524 but neglects the phone number login:

This will be updated in another PR to implement desired things:
- Country code visible once a country has been selected (propbably but as a prefix to the phone number input box.
- Use square flags
- Move CountryDropdown above phone input and make it show the full country name when not expanded
- Auto-select country based on IP
MatrixChat was trying to display an error if the session failed to
restore, but it was never actually being shown because it was just
set as a member variable and therefore never actually caused
a re-render for the error to be displayed. Almost all errors are
caught by _restoreFromLocalStorage which displays the fancy dialog
if your session can't be restored, so I'm not convinced this ever
even tried to do anything anyway. Remove it.
* WIP msisdn sign in
* A mostly working country picker
* Fix bug where you'dbe logged out after registering
Stop the guest sync, otherwise it gets 401ed for using a guest
access token for a non-guest, causing us to beliebe we've been
logged out.
* Use InteractiveAuth component for registration
* Fix tests
* Remove old signup code
* Signup -> Login
Now that Signup contains no code whatsoever related to signing up,
rename it to Login. Get rid of the Signup class.
* Stray newline
* Fix more merge failing
* Get phone country & number to the right place
* More-or-less working msisdn auth component
* Send the bind_msisdn param on registration
* Refinements to country dropdown
Rendering the whole lot when the component was rendered just makes
the page load really slow, so just show 2 at a time and rely on
type-to-search.
Make type-to-search always display an exact iso2 match first
* Propagate initial inputs to the phone input
* Support msisdn login
* semicolon
* Fix PropTypes
* Oops, use the 1qst element of the array
Not the array of object keys which has no particular order
* Make dropdown/countrydropdown controlled
* Unused line
* Add note on DOM layout
* onOptionChange is required
* More docs
* Add missing propTypes
* Don't resume promise on error
* Use React.Children to manipulate children
* Make catch less weird
* Fix null dereference
Assuming [0] of an empty list == undefined doesn't work if you're
then taking a property of it.
1) custom HS/IS urls are now persisted in HTML5 local storage. As a result, all the login components now distinguish between default HS/IS URLs and custom specified ones again. (
2) custom HS/IS urls are synchronised between the instances of ServerConfig found in the Login, Registration and Forgot Password screens.
3) username are persisted over changing homeserver (but not password, to stop accidentally leaking passwords to the wrong server)
4) correctly interpret a blank URL field as meaning the placeholder text
5) when toggling custom URLs on and off, remember what the custom values were, and use the default URLs if custom mode is not engaged
also, guest access now upholds custom HS/IS URLs found in local storage rather than being limited to the server config ()
also adds assorted comments and improved console debug and a few minor cosmetic changes to the login components.
this commit sponsored by VS27...
This adds a link to the login screen with "Forgot your password?". Clicking it
takes you to a form with fields for an email address and a new password. This
makes the same API calls as the Angular SDK.
Manually tested resetting + not clicking link + invalid email and it all seems
to work.