qrcode: wire in amount in qr string

[thelostone-mc]

Description

• adds amount into qr code
• capability to allow user to not include amount in QR

Refers/Fixes

Testing

• QR code tested in Trust wallet for ETC and it works
• QR code works on Moonlet wallet

[codecov]

Codecov Report

Merging #6759 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #6759   +/-   ##
=======================================
  Coverage   26.66%   26.66%           
=======================================
  Files         294      294           
  Lines       28118    28118           
  Branches     4135     4135           
=======================================
  Hits         7498     7498           
+ Misses      20354    20349    -5     
- Partials      266      271    +5     

Impacted Files	Coverage Δ
app/quests/views.py	16.22% <0.00%> (ø)
app/dashboard/views.py	10.64% <0.00%> (ø)
...rketing/management/commands/no_applicants_email.py	0.00% <0.00%> (ø)
...eting/management/commands/assemble_leaderboards.py	39.83% <0.00%> (ø)

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