Problem: unsuppored sign mode SIGN_MODE_TEXTUAL in bank transfer

[mmsqe]

👮🏻👮🏻👮🏻 !!!! REFERENCE THE PROBLEM YOUR ARE SOLVING IN THE PR TITLE AND DESCRIBE YOUR SOLUTION HERE !!!! DO NOT FORGET !!!! 👮🏻👮🏻👮🏻

PR Checklist:

• Have you read the CONTRIBUTING.md?
• Does your PR follow the C4 patch requirements?
• Have you rebased your work on top of the latest master?
• Have you checked your code compiles? (make)
• Have you included tests for any non-trivial functionality?
• Have you checked your code passes the unit tests? (make test)
• Have you checked your code formatting is correct? (go fmt)
• Have you checked your basic code style is fine? (golangci-lint run)
• If you added any dependencies, have you checked they do not contain any known vulnerabilities? (go list -json -m all | nancy sleuth)
• If your changes affect the client infrastructure, have you run the integration test?
• If your changes affect public APIs, does your PR follow the C4 evolution of public contracts?
• If your code changes public APIs, have you incremented the crate version numbers and documented your changes in the CHANGELOG.md?
• If you are contributing for the first time, please read the agreement in CONTRIBUTING.md now and add a comment to this pull request stating that your PR is in accordance with the Developer's Certificate of Origin.

Thank you for your code, it's appreciated! :)

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 34.24%. Comparing base (1a8a95e) to head (65da8a6).

Files with missing lines	Patch %	Lines
cmd/chain-maind/app/app.go	73.68%	3 Missing and 2 partials ⚠️
app/app.go	87.50%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1152      +/-   ##
==========================================
+ Coverage   31.75%   34.24%   +2.49%     
==========================================
  Files          93      101       +8     
  Lines       17026    17355     +329     
==========================================
+ Hits         5406     5944     +538     
+ Misses      10678    10457     -221     
- Partials      942      954      +12     

Flag	Coverage Δ
integration_tests	24.01% <80.00%> (+0.09%)	⬆️
integration_tests_byzantine	11.07% <80.00%> (+0.12%)	⬆️
integration_tests_gov	11.32% <80.00%> (+0.12%)	⬆️
integration_tests_grpc	11.32% <80.00%> (+0.12%)	⬆️
integration_tests_ibc	26.61% <80.00%> (+0.09%)	⬆️
integration_tests_ledger	11.30% <80.00%> (+0.12%)	⬆️
integration_tests_slow	11.30% <80.00%> (+0.12%)	⬆️
integration_tests_solomachine	11.10% <80.00%> (+0.12%)	⬆️
integration_tests_upgrade	11.32% <80.00%> (+0.12%)	⬆️
unit_tests	11.69% <40.00%> (?)

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