refactor: improve amount and send max in send transfer

[luciorubeens]

Summary

Use the maximum amount available based on the sender wallet balance and selected fee.

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #2910 into develop will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##           develop     #2910   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          349       349           
  Lines         4893      4905   +12     
  Branches       903       904    +1     
=========================================
+ Hits          4893      4905   +12     

Flag	Coverage Δ
#unit	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ansaction/components/AddRecipient/AddRecipient.tsx	100.00% <100.00%> (ø)
...ns/transaction/pages/SendTransfer/SendTransfer.tsx	100.00% <100.00%> (ø)
...c/domains/transaction/pages/SendTransfer/Step1.tsx	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c8eeda6...fe557b5. Read the comment docs.