Pre-populate creative images when cloned

[coderberry]

Type of PR

• [ ] feature
• [ ] enhancement
• [x] bug fix
• [ ] other

Description

Pre-populate dropdown images with cloned images if cloning.

Fixes #1297

Checklist

• [x] My code follows the style guidelines of this project & the tests are passing
• [x] I have performed a self-review of my own code
• [x] I have requested a review from another developer(s)

Screenshots

[codecov[bot]]

Codecov Report

Merging #1299 into master will increase coverage by 0.01%. The diff coverage is 20.00%.

@@            Coverage Diff             @@
##           master    #1299      +/-   ##
==========================================
+ Coverage   34.50%   34.51%   +0.01%     
==========================================
  Files         344      344              
  Lines        7942     7951       +9     
==========================================
+ Hits         2740     2744       +4     
- Misses       5202     5207       +5     

Impacted Files	Coverage Δ
app/controllers/creatives_controller.rb	0.00% <0.00%> (ø)
app/models/image.rb	0.00% <0.00%> (ø)
app/models/creative.rb	65.21% <66.66%> (+0.03%)	:arrow_up:
app/controllers/impressions_controller.rb	86.95% <0.00%> (+8.69%)	:arrow_up: