Bugs with non-default Gaia Hub & multiple accounts

[zone117x]

• Bugs with multiple accounts: several areas performing gaia reads/writes use an app-state-singleton setting for the gaiahub rather than an account's specific gaiahub config. One bug causes is that only the first account can use a private gaiahub, accounts N+1 will fail to connect.
• Default gaia hub is always used initially when restoring account, and eventually gets fixed as side-effect by later code.

[timstackblock]

@jeffdomke this is related to the .json profile issue but specifically using more that 1 Gaia hub or multiple accounts so we should take this into consideration in the rebuild adding this to your doc https://paper.dropbox.com/doc/DevX-Q3-2019--AiZQbPfKFbY1jDmfXRM8_nrhAg-QNvrtrkmUB01dI5QmQNtd