show 'joined Gitcoin' as an item on /activity

[owocki]

Description

show 'joined Gitcoin' as an item on /activity, and on profiles

this lets us eyeball who is joining and what they're into just by looking at /activity -- also makes the network more active

Refers/Fixes

self

Testing

tested locally

[owocki]

this is as much for performance / simplicity as it is for the 'joined' activity

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@d171e40). Click here to learn what that means.
The diff coverage is 25%.

@@            Coverage Diff            @@
##             master    #4836   +/-   ##
=========================================
  Coverage          ?   30.43%           
=========================================
  Files             ?      216           
  Lines             ?    17335           
  Branches          ?     2354           
=========================================
  Hits              ?     5276           
  Misses            ?    11850           
  Partials          ?      209

Impacted Files	Coverage Δ
app/dashboard/views.py	14.57% <0%> (ø)
app/app/context.py	52.27% <25%> (ø)
app/dashboard/models.py	55.76% <33.33%> (ø)

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[codecov]

Codecov Report

Merging #4836 into master will decrease coverage by <.01%.
The diff coverage is 28.57%.

@@            Coverage Diff             @@
##           master    #4836      +/-   ##
==========================================
- Coverage   30.43%   30.43%   -0.01%     
==========================================
  Files         216      216              
  Lines       17333    17335       +2     
  Branches     2352     2353       +1     
==========================================
  Hits         5276     5276              
- Misses      11848    11850       +2     
  Partials      209      209

Impacted Files	Coverage Δ
app/app/context.py	52.27% <25%> (-3.83%)	⬇️
app/dashboard/models.py	55.76% <33.33%> (+0.03%)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cc3607f...ce1e6f6. Read the comment docs.