[rococo] Can't endorse as bootstrapper on the contact page due to mismatch of ss58 prefix

[clangenb]

The app does not recognize when the current account is a bootstrapper because, here:

• the bootstrappers are returned by the node with prefix 2
• we have hardcoded the prefix of rococo in the app to 42

The curious thing here is that this check used to work; hence, it hasn't always been the case that the rococo network returned the bootstrappers with prefix 2.

Note again: this only concern rococo, all other networks work fine.

[clangenb]

Connected to this issue maybe: encointer/encointer-parachain#203

[clangenb]

Interestingly, this problem has been resolved in 1.11.2 after switching to the dart api