fix for regression around bounty mentor payloads

[androolloyd]

Description

Cleanup for the Integrated Hackathon view, move the ManageSponsor Component to ManageMentors and migrated it to the sponsor dashboard.

Refers/Fixes

Testing

https://a.cl.ly/o0u8ZO9r

[codecov]

Codecov Report

Merging #7284 into master will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master    #7284   +/-   ##
=======================================
  Coverage   26.10%   26.10%           
=======================================
  Files         300      300           
  Lines       29696    29696           
  Branches     4410     4408    -2     
=======================================
  Hits         7752     7752           
+ Misses      21672    21667    -5     
- Partials      272      277    +5     

Impacted Files	Coverage Δ
app/dashboard/views.py	10.43% <0.00%> (ø)
app/quests/views.py	16.22% <0.00%> (ø)
...rketing/management/commands/no_applicants_email.py	0.00% <0.00%> (ø)
...eting/management/commands/assemble_leaderboards.py	39.73% <0.00%> (ø)

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