#3092722: new plain text formatter

#3092722: This is a new branch rebased off 2.0.x. Attempting to rebase the existing branch on the issue resulted in a non-mergeable MR.

Closes #3092722

added 6 commits

• 366ba755 - 1 commit from branch project:2.0.x
• 6e58e728 - Add plain text formatter
• d89a7f4a - #3092722: add defaultTheme to JsonApiReferenceFieldBase as per [#3083055].
• b7b372ca - #3092722: explicitly return coide from test setUp() functions. Replace use...
• 0685add9 - #3092722: remove contradictory comment from testLabelAttributeSetting()....
• e9aa3004 - #3092722: commit whilst rebasing on to 2.0.x branch.

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added 1 commit

• dc1eb27a - #3092722: move the setting of the jsonapi_reference configuration to the...

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added 3 commits

• a2fd2202 - 1 commit from branch project:2.0.x
• 9e093b72 - #3092722: fix typo on @param for TypedResourceObjectStringFormatter::getResourceObjectResponse().
• cf19690c - Merge branch '2.0.x' into 3092722-text_field_formatter_against_2_0_x

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added 1 commit

• 2171bc78 - #3092722: ️ remove guid display option - it adds nothing to the Default...

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added 1 commit

• b5661b9d - #3092722: ️ update testLabelGuid() test to use the new label_id name for the...

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added 1 commit

• d6ce1d9c - #3092722: add post update hook to update legacy field formatter settings in...

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merged