Issue #2980893: re-roll patch #2 that adds hooks for import, export and update.

Closes #2980893

added 6 commits

• 8d49d04f...812c2ddb - 5 commits from branch project:2.x
• ddcac931 - Re-roll patch #2 from issue #2980893.

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added 8 commits

• ddcac931...51a15a1b - 7 commits from branch project:2.x
• aff36f6b - Re-roll patch #2 from issue #2980893.

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added 1 commit

• 81c93cfb - Issue #2980893 by DYdave: Fixed coding standards issues, added static helper...

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added 17 commits

• 81c93cfb...9470c3a2 - 15 commits from branch project:2.x
• 01f057d0 - Re-roll patch #2 from issue #2980893.
• 61f1f3b5 - Issue #2980893 by DYdave: Fixed coding standards issues, added static helper...

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added 4 commits

• 61f1f3b5...be23c4b4 - 2 commits from branch project:2.x
• 37f560e2 - Re-roll patch #2 from issue #2980893.
• 8914a580 - Issue #2980893 by DYdave: Fixed coding standards issues, added static helper...

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added 1 commit

• d6a0cbd0 - Add a test for the hooks added in 2980893.

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added 1 commit

• 09235135 - Change how we inject new dependency to MenuLinksController.

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added 1 commit

• 62bbc96f - Remove extra call to save menu link in testExportAndImportWithCustomData().

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resolved all threads