EW: Make identity reset consistent with EX

[mxandreas]

Background

Historically EW had many different identity resets, some of which only reset the cross-signing keys and some of which also reset "everything" (meaning any server-side copies of any keys as well as the server side storage as such). The other difference was that in some variants, EW also automatically asked user to set up recovery (on EX this step was separated from the reset flow).

To simplify it for the end users, and make it consistent with EX behavior, only one type of reset will be kept - the one that resets "everything" and does not set up recovery as part of it.

Problem

This new reset, including the new designs has been implemented for the scenarios:

• when the user goes proactively to Settings > Encryption > Advanced and triggers it.
• when user is notified that their key storage is out of sync, and the user chooses the Forgot recovery key option.

However, there are other scenarios which are not currently covered.

All of them have the same cause - the user needs to verify their device but is not able to - but the entry points in UI are several:

• The user tries to login.
• The user is already in the app but the device not verified:
  • Tries to access Settings > Encryption.
  • Tries to proactively verify the device (e.g. in the Sessions / Devices)
  • Gets a toast that prompts to verify the device.

Designs

• When reset is done during login.
• When reset is triggered when already in app.

Clarifications on the designs:

• All the current confirmation modals that currently appear right after clicking reset (there are a few variations depending on the starting point), should be removed. The very first screen is the one linked above (on the left are old, on the right the new design).

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• Modernizing the screen that is used in case of OIDC (user is directed to MAS web app) is a stretch goal. The minimum is to make sure that the copy of the current modal follows the copy of new designs (current modal on the left, new designs on the right).

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