bounty: changes cancel button to red

[thelostone-mc]

PR does three things

• bounty details page -> updates cancel button color to red
• update banner & cancel button color to red
• prettifies admin control

Fixes: #2145

[codecov]

Codecov Report

Merging #2146 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2146      +/-   ##
==========================================
- Coverage   27.83%   27.82%   -0.01%     
==========================================
  Files         136      136              
  Lines       11167    11169       +2     
  Branches     1509     1509              
==========================================
  Hits         3108     3108              
- Misses       7949     7951       +2     
  Partials      110      110

Impacted Files	Coverage Δ
...eting/management/commands/assemble_leaderboards.py	49.37% <0%> (-0.63%)	⬇️

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[owocki]

is it worth changing the color of the button on the bounty/kill page itself, too?

[thelostone-mc]

@owocki ah nice catch ! Added that and attached a screenshot