Berry/1281 missing country flags

[coderberry]

Type of PR

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

Description

Replaced emoji (that do not show on some browsers) with flag images.

Fixes #1281

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 #1301 into master will increase coverage by 0.04%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #1301      +/-   ##
==========================================
+ Coverage   34.44%   34.48%   +0.04%     
==========================================
  Files         344      344              
  Lines        7935     7936       +1     
==========================================
+ Hits         2733     2737       +4     
+ Misses       5202     5199       -3     

Impacted Files	Coverage Δ
app/controllers/comments_controller.rb	0.00% <0.00%> (ø)
...dels/concerns/daily_summary_reports/presentable.rb	0.00% <0.00%> (ø)
app/models/daily_summary_report.rb	0.00% <ø> (ø)
app/components/application_component.rb	50.00% <100.00%> (+3.33%)	:arrow_up:
...pp/components/comments/rich_text_form_component.rb	100.00% <100.00%> (ø)
app/models/comment.rb	94.73% <100.00%> (+0.29%)	:arrow_up:
app/controllers/impressions_controller.rb	86.95% <0.00%> (+8.69%)	:arrow_up: