Unify buttons look in the application

[mutuajames]

This removes the nesting of buttons and links which were invalid HTML. The solution is to either use one or the other depending on what is required.
closes #1222

[codecov-commenter]

Codecov Report

Merging #1227 (5e462ec) into master (641ece4) will decrease coverage by 0.29%.
The diff coverage is 45.83%.

@@            Coverage Diff             @@
##           master    #1227      +/-   ##
==========================================
- Coverage   95.05%   94.77%   -0.29%     
==========================================
  Files         321      322       +1     
  Lines        9389     9429      +40     
  Branches     2034     2034              
==========================================
+ Hits         8925     8936      +11     
- Misses        456      485      +29     
  Partials        8        8              

Impacted Files	Coverage Δ
app/src/containers/pages/Home/Home.tsx	94.73% <ø> (ø)
...mponents/PatientDetails/ResourceSchema/Patient.tsx	100.00% <ø> (ø)
...-management/src/components/CommodityList/index.tsx	95.34% <ø> (ø)
...roup-management/src/components/GroupList/index.tsx	92.00% <0.00%> (-3.84%)	⬇️
...agement/src/components/UserList/ListView/index.tsx	97.77% <0.00%> (-2.23%)	⬇️
.../src/components/UserList/ListView/tableColumns.tsx	96.15% <ø> (ø)
...nagement/src/components/LocationUnitList/Table.tsx	100.00% <ø> (ø)
...ackages/fhir-views/src/QuestionnaireList/index.tsx	100.00% <ø> (ø)
...tory/src/components/PreConfirmationError/index.tsx	100.00% <ø> (ø)
...ent/src/components/LocationUnitGroupList/Table.tsx	93.75% <ø> (ø)
... and 20 more

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[machariamuguku]

LGTM