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

* Progress

* Progress

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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

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docs/sources/setup-grafana/configure-grafana/feature-toggles/index.md

@@ -86,6 +86,7 @@ Most [generally available](https://grafana.com/docs/release-life-cycle/#general-
 | `azureMonitorEnableUserAuth`           | Enables user auth for Azure Monitor datasource only                                                                                 | Yes                |
 | `alertingNotificationsStepMode`        | Enables simplified step mode in the notifications section                                                                           | Yes                |
 | `lokiLabelNamesQueryApi`               | Defaults to using the Loki `/labels` API instead of `/series`                                                                       | Yes                |
+| `unifiedNavbars`                       | Enables unified navbars                                                                                                             |                    |
 
 ## Public preview feature toggles