Fix for query preview validation

[mike12345567]

Description

This fixes the validation in the released version for query preview, e.g. SQL queries. There was some problems with the validation using the new method of API request.

This issue has been mentioned in #4440 and #4431.

Also fixed an issue with button group being close together, no gap attribute, allowed it to be added so not to risk causing issues elsewhere.

[codecov-commenter]

Codecov Report

Merging #4447 (3aac333) into master (a897030) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4447   +/-   ##
=======================================
  Coverage   67.91%   67.92%           
=======================================
  Files         144      144           
  Lines        4922     4923    +1     
  Branches      761      761           
=======================================
+ Hits         3343     3344    +1     
  Misses       1105     1105           
  Partials      474      474           

Impacted Files	Coverage Δ
...ges/server/src/api/controllers/query/validation.js	100.00% <100.00%> (ø)

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