Support grouping by and aggregation on same column

Closes #3494340

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• b66cf7a8 - Fix phpcs reported errors.

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• 931a0a0d - Another minor phpcs fix.

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• c4e8eb7c - Ensure that order by columns are also part of selected columns when they are not added as fields.
• e205b711 - Replace space in strings with underscore.
• bf37fd75 - Added more test coverage for the new code and fixed test that were passing with the broken code.

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• 3398fd83 - Fix grammar mistake.

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• 2db0c20a - Updated how the row is built for views csv query.

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• f1a48b88 - Added test to check a CSV with empty columns.
• 33b1fffc - Changed how selected fields are applied.
• 7fdefc2e - Ensure that getHeader only returns non empty headers.

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• 68476318 - Using foreach instead of array map to assign values to colum aliases.

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added 2 commits

• d78880f2 - Add spacing.
• 37f8f259 - Try row column when alias does not have a value.

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merged