refactor: fixup listen_for_web3_changes

[thelostone-mc]

This moved the listen_for_web3_changes to the files where it's needed as opposed to having it shared.js

Flows tested

✔️ Bounties
✔️ Tips
✔️ Townsquare PART 1 & PART 2
✔️ Kudos
✔️ Activities page PART 1 & PART 2
✔️ Grants

[codecov]

Codecov Report

Merging #6355 into master will increase coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6355      +/-   ##
==========================================
+ Coverage   27.56%   27.65%   +0.08%     
==========================================
  Files         282      282              
  Lines       26145    26200      +55     
  Branches     3849     3856       +7     
==========================================
+ Hits         7208     7246      +38     
- Misses      18672    18685      +13     
- Partials      265      269       +4

Impacted Files	Coverage Δ
...eting/management/commands/assemble_leaderboards.py	40.48% <0%> (ø)	⬆️
app/dashboard/views.py	11.21% <0%> (ø)	⬆️
...rketing/management/commands/no_applicants_email.py	0% <0%> (ø)	⬆️
app/kudos/models.py	53.65% <0%> (+2.82%)	⬆️

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[owocki]

note that this wont populate the web3 info for 5000ms after pageload. listen_for_web3_changes() should probably be called immediately upon load unless we re hoping that people dont interact with web3 for 5s.

[owocki]

@thelostone-mc what parts of grants did you test? would love to make sure that fund grant, cancel grant, new grant, AND edit grant all still work bc we'll def hear about it after deploy if not

[owocki]

@thelostone-mc this one got missed (settings/tokens )

fixed at e8cd9ed https://gitcoincore.slack.com/archives/CAXQ7PT60/p1586549633106500

[owocki]

also 06bf49c