fix(aepp,wallet): connect to web-extension if opened over file:///

[davidyuk]

closes #1872

This PR is supported by the Æternity Crypto Foundation

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: -0.05% ⚠️

Comparison is base (dec62a4) 81.37% compared to head (da6a025) 81.33%.
Report is 14 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1900      +/-   ##
===========================================
- Coverage    81.37%   81.33%   -0.05%     
===========================================
  Files           94       94              
  Lines         3361     3359       -2     
  Branches       671      670       -1     
===========================================
- Hits          2735     2732       -3     
  Misses         303      303              
- Partials       323      324       +1     

Files Changed	Coverage Δ
src/aepp-wallet-communication/wallet-detector.ts	29.41% <0.00%> (+3.09%)	⬆️
src/tx/builder/field-types/fee.ts	95.55% <0.00%> (ø)
src/tx/builder/field-types/gas-price.ts	77.77% <0.00%> (ø)
src/utils/crypto.ts	95.74% <ø> (ø)
src/contract/Contract.ts	75.28% <100.00%> (ø)
src/utils/autorest.ts	90.66% <100.00%> (ø)

... and 1 file with indirect coverage changes

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