BUGFIX: RAIL-2138, RAIL-2131 Fix saveAs button problem with old dashboards without layout and update date in meta

[Tulean]

Proposed release type: patch
(https://semver.org/#semantic-versioning-specification-semver))

PR checklist

• Change was tested using dev-release in Analytical Designer and Dashboards (if applicable).
• Change is described in CHANGELOG.md.
• Migration guide (for major update) is written to CHANGELOG.md.
• The proposed release type is appropriate (see the comment in PR template)

Related PRs

• gdc-dashboards: https://github.com/gooddata/gdc-dashboards/pull/2649
• gdc-analytical-designer: https://github.com/gooddata/gdc-analytical-designer/pull/2926

[gdgate]

Build succeeded (check pipeline).

• https://checklist.intgdc.com/job/compliance/job/gooddata-js-oss-check/93/ : SUCCESS in 26s
• https://checklist.intgdc.com/job/client-libs/job/gooddata-js-unit-tests-zuul-docker-el7/528/ : SUCCESS in 52s

[gdgate]

Build succeeded (check pipeline).

• https://checklist.intgdc.com/job/compliance/job/gooddata-js-oss-check/94/ : SUCCESS in 4s
• https://checklist.intgdc.com/job/client-libs/job/gooddata-js-unit-tests-zuul-docker-el7/529/ : SUCCESS in 1m 02s

[gdgate]

Build succeeded (check pipeline).

• https://checklist.intgdc.com/job/compliance/job/gooddata-js-oss-check/95/ : SUCCESS in 3s
• https://checklist.intgdc.com/job/client-libs/job/gooddata-js-unit-tests-zuul-docker-el7/530/ : SUCCESS in 1m 25s

[no23reason]

LGTM

[gdgate]

Build succeeded (gate pipeline).

• https://checklist.intgdc.com/job/compliance/job/gooddata-js-merge-compliance-check/122/ : SUCCESS in 12s
• https://checklist.intgdc.com/job/client-libs/job/gooddata-js-unit-tests-zuul-docker-el7/531/ : SUCCESS in 1m 58s