106: add: toggle turn off popup on mnemonic login

[ryuash]

Description

closes #106

Checklist

• [x] Targeted PR against correct branch.
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [x] Wrote unit tests.
• [x] Run flutter format.
• [ ] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [x] Re-reviewed Files changed in the Github PR explorer.

[codecov[bot]]

Codecov Report

Merging #129 into master will increase coverage by 0.03%. The diff coverage is 22.22%.

@@            Coverage Diff             @@
##           master     #129      +/-   ##
==========================================
+ Coverage   61.76%   61.80%   +0.03%     
==========================================
  Files         266      266              
  Lines        6711     6718       +7     
==========================================
+ Hits         4145     4152       +7     
  Misses       2566     2566              

Impacted Files	Coverage Δ
...i/blocs/recover_account/recover_account_event.dart	40.00% <ø> (+13.33%)	:arrow_up:
...ui/blocs/recover_account/recover_account_bloc.dart	75.00% <12.50%> (-15.00%)	:arrow_down:
...ui/widgets/recover_account_main_content/index.dart	50.70% <100.00%> (+6.41%)	:arrow_up:

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[ryuash]

added