[Shropshire] Amendments from workshop

[davea]

A few changes as a result of the workshop we held with Shropshire:

• Pin colours
• Enable Street Manager

For FD-????

[skip changelog]

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 82.24%. Comparing base (decaf3f) to head (46a50af).

Files with missing lines	Patch %	Lines
perllib/FixMyStreet/Cobrand/Shropshire.pm	40.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5265      +/-   ##
==========================================
- Coverage   82.24%   82.24%   -0.01%     
==========================================
  Files         412      412              
  Lines       32386    32391       +5     
  Branches     5173     5175       +2     
==========================================
+ Hits        26637    26641       +4     
+ Misses       4206     4205       -1     
- Partials     1543     1545       +2     

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