[aberdeenshire] Fixes for styling & accessibility issues

[lucascumsille]

Fixes: https://github.com/mysociety/societyworks/issues/4990 Fixes: https://github.com/mysociety/societyworks/issues/4988

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.24%. Comparing base (3e6f4c6) to head (b5b63bf).

Additional details and impacted files

@@                    Coverage Diff                     @@
##           aberdeenshire-reviewed    #5542      +/-   ##
==========================================================
- Coverage                   82.52%   82.24%   -0.28%     
==========================================================
  Files                         442      437       -5     
  Lines                       37298    34374    -2924     
  Branches                     6279     5555     -724     
==========================================================
- Hits                        30779    28271    -2508     
+ Misses                       4788     4460     -328     
+ Partials                     1731     1643      -88     

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