AppChrome: Improved responsive use of vertical space (#103488)

* Progress

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* Update

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* Responsive improvements

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* Revert height change

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* add missing testid

* update

* Fixes

* update

* Refactoring

* fix bug in app chrome service

* Fixed e2e tests

* fix

* fix

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* fix bookmarks e2e

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* improve responsiveness on small screens for breadcrumbs

* Always use two levels when menu is docked

* Adding kiosk toggle button to dashboards only

* update

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* when menu is docked and no actions use 1 level

* removed formatting change that caused unnessary diff in PR

* remove extra separator line after merge with main

* Fix double separators

* Update

* remove temp change

* Update

pkg/services/featuremgmt/toggles_gen.csv

@@ -232,5 +232,6 @@ alertingRuleRecoverDeleted,GA,@grafana/alerting-squad,false,false,true
 xrayApplicationSignals,experimental,@grafana/aws-datasources,false,false,true
 multiTenantTempCredentials,experimental,@grafana/aws-datasources,false,false,false
 localizationForPlugins,experimental,@grafana/plugins-platform-backend,false,false,false
+unifiedNavbars,GA,@grafana/plugins-platform-backend,false,false,true
 logsPanelControls,privatePreview,@grafana/observability-logs,false,false,true
 metricsFromProfiles,experimental,@grafana/observability-traces-and-profiling,false,false,true