Implements fix for #80

[jsperezg]

🎩 What? Why?

Adds introductory image for consultations

📌 Related Issues

• Related to Add image when video not available on consultations #80

[codecov-io]

Codecov Report

Merging #84 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
+ Coverage   94.84%   94.86%   +0.02%     
==========================================
  Files          65       65              
  Lines        1241     1246       +5     
==========================================
+ Hits         1177     1182       +5     
  Misses         64       64

Impacted Files	Coverage Δ
...s/decidim/consultations/admin/consultation_form.rb	100% <100%> (ø)	⬆️
...decidim/consultations/admin/create_consultation.rb	100% <100%> (ø)	⬆️
...decidim/consultations/admin/update_consultation.rb	100% <100%> (ø)	⬆️
app/models/decidim/consultation.rb	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ada720b...1337b58. Read the comment docs.