[REF] [EXPORT] Alter CRM_Export_BAO_Export::exportComponents

[colemanw]

Overview

Refactors the function CRM_Export_BAO_Export::exportComponents to accept fields in a standard format, rather than the crazy thing we get back from Quickform. This allows the new ExportUi extension to work.

Before

Field format converted from qf to standard array inside function.

After

Field format converted from qf to standard array outside function.

[civibot]

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[eileenmcnaughton]

Code changes are as expected /planned/discussed - let's see what Jenkins says

Note we expect to do more r-run testing once this is all settled

[eileenmcnaughton]

Relevant tests have passed - I'm going to merge this now as we have some conflict issues that need resolving once this is merged (I'll check there was no test fall out today just in case)