feat: notify funder to extend expiration date before taking action

[thelostone-mc]

Description

• refactored code
• the text pops up only when the following conditions are all met
  a) bounty is expired
  b) logged in user is bounty owner (with the right metamask address )
  c) issue has not been done / cancelled

closes #4110

[codecov]

Codecov Report

Merging #4161 into master will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4161      +/-   ##
==========================================
- Coverage   30.26%   30.22%   -0.04%     
==========================================
  Files         206      206              
  Lines       16367    16367              
  Branches     2154     2154              
==========================================
- Hits         4953     4947       -6     
- Misses      11238    11244       +6     
  Partials      176      176

Impacted Files	Coverage Δ
app/dashboard/embed.py	28.16% <0%> (-3.45%)	⬇️

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