Maker has upgraded its Dai token to "Multi-Collateral Dai" (MCD) and requires
all users interacting with Dai migrate their tokens to the new version. Dai
now exclusively refers to Multi-Collateral Dai and what was previouly called
Dai is now Sai (Single Collateral Dai).
In this description, Sai refers to what was (prior to the 2019-11-18) known as Dai.
Dai is the _new_ token.
This changeset:
1. Only affects users who had non-zero Sai at the old contract address
2. Displays a persistent notification for users with Sai
3. Updates the token symbol for users already tracking the Sai token
4. Bumps our direct and indirect eth-contract-metadata dependencies
The notification copy:
> A message from Maker: The new Multi-Collateral Dai token has been released. Your old tokens are now called Sai. Please upgrade your Sai tokens to the new Dai.
The copy is from the Maker team.
The home notification static height of 116px is too cramped for longer
messages, such as the one used for the Sai migration. The old height is
now used for the minimum height instead, with a margin to ensure the
text doesn't get too close to the buttons.
Of the 7 different icon sizes we have, only four were referenced in
the manifest. All 7 are now listed, which leaves the browser more to
choose from when deciding which to use.
The 'beforeunload' handler was being bound to the module scope instead
of the instance scope, because the class was defined using prototypes
rather than the ES6 class syntax. The arrow functions were removed, and
the handler is now bound explicitly in the constructor.
The 'beforeunload' handler was being bound to the module scope instead
of the instance scope, because the class was defined using prototypes
rather than the ES6 class syntax. The arrow functions were removed, and
the handler is now bound explicitly in the constructor.
Most of the rules in the import plugin are only useful for projects
using purely ES6 imports. The `no-unresolved` rule works with mixed
CommonJS and ES6 though, so we at least benefit from that in the
meantime.
This was first implemented in #7335, but the final version didn't work
because the `_beforeUnload` handler was not bound early, so `this` was
not defined when it was triggered.
