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:
![login_with_msisdn](https://cloud.githubusercontent.com/assets/1922197/24864469/30a921fc-1dfc-11e7-95d1-76f619da1402.png)
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
apparently when we added the buttons to export e2e keys to the Logout button, we didn't change the text warning the user that e2e export was coming soon. likewise when changing password and forgetting password (where we didn't even have a button to export keys)
This was an issue because guests do not log in with a teamToken, it is implicitly set by MatrixChat when it mounts. The fix is to view_home_page when a login occurs and MatrixChat has this._teamToken set.
- Create a promise that will serve as a lock to be blocked on by things that need to wait for the first sync before accessing state.
- Use this promise to block `view_room` calls until a sync has occured instead of just dropping them silently if the sync hasn't happened yet.
- Store the current room ID in a localStorage item `mx_last_room_id` when `view_room` fires. This persists the last viewed room ID so that it can be restored on refresh, browser quit. This replaces the previous logic which set the room following a sync based on the most recent unread room.
Making sure that a node is intersected by the bottom of the wrapper is a bit overkill, given that we iterate from the bottom. This also prevents the scenario of having no nodes that are not precisely intersected, but possibly straddling the bottom of the wrapper.