[8.19] [Discover] Fix "Body cell lines" display option handling when default value is -1 (#228697)#228879
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davismcphee merged 2 commits intoelastic:8.19from Jul 22, 2025
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… value is `-1` (elastic#228697) ## Summary This PR fixes the handling of the "Body cell lines" display option in Discover when the default value is set to `-1` in Advanced Settings. It will now set the cell lines input to a default value instead of `-1` in this case, and will not prevent users from switching from "Auto" to "Custom" mode. Additionally, some changes were made to the validation to address some bugs and improve the UX: - Manually setting a value of `-1` does not automatically switch to "Auto" mode and cause the user to get stuck again. - The last valid input value will be restored when switching from "Custom" to "Auto" with an invalid value. - Deleting the current value allows users to actually clear the input and enter a new value instead of it automatically being reset to `1` or `0`. Fixes elastic#228682. ### Checklist - [ ] Any text added follows [EUI's writing guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses sentence case text and includes [i18n support](https://github.com/elastic/kibana/blob/main/src/platform/packages/shared/kbn-i18n/README.md) - [ ] [Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html) was added for features that require explanation or tutorials - [x] [Unit or functional tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html) were updated or added to match the most common scenarios - [ ] If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the [docker list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker) - [ ] This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The `release_note:breaking` label should be applied in these situations. - [ ] [Flaky Test Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was used on any tests changed - [x] The PR description includes the appropriate Release Notes section, and the correct `release_note:*` label is applied per the [guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process) - [x] Review the [backport guidelines](https://docs.google.com/document/d/1VyN5k91e5OVumlc0Gb9RPa3h1ewuPE705nRtioPiTvY/edit?usp=sharing) and apply applicable `backport:*` labels. (cherry picked from commit de5e2a6) # Conflicts: # src/platform/packages/shared/kbn-unified-data-table/src/components/data_table_additional_display_settings.tsx
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