Fix migration of accounts

[pelle]

Should fix the following:

• [x] Ethereum Accounts are not migrated with Legacy Identity in this case it simply leaves the accounts alone as long as the user can still sign with them. They will still be attached to legacy identity
• [x] recovery incorrectly loading old identity this removes old backup. Switches backup off. Then re-enables backup after migration causing a new migration to be made

As mentioned, this has only been tested in unit tests and needs thorough testing by a developer before releasing to QA for testing

[codecov[bot]]

Codecov Report

Merging #106 into develop will decrease coverage by <.01%. The diff coverage is 93.75%.

@@             Coverage Diff             @@
##           develop     #106      +/-   ##
===========================================
- Coverage    54.62%   54.62%   -0.01%     
===========================================
  Files          274      274              
  Lines         9172     9176       +4     
  Branches      1872     1882      +10     
===========================================
+ Hits          5010     5012       +2     
- Misses        3699     3700       +1     
- Partials       463      464       +1

Impacted Files	Coverage Δ
lib/sagas/startupSaga.js	0% <ø> (ø)	:arrow_up:
lib/sagas/index.js	0% <ø> (ø)	:arrow_up:
lib/screens/settings/UportId.js	0% <0%> (ø)	:arrow_up:
lib/sagas/keychain.js	75.7% <100%> (ø)	:arrow_up:
lib/sagas/migrations/MigrateLegacy.ts	85.93% <100%> (+0.93%)	:arrow_up:
lib/actions/hubActions.js	85.71% <0%> (-14.29%)	:arrow_down:

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