Move tab navigation to sidebar
Related to #382327 (comment 1257183733)
We will be moving the tabs navigation to a sidebar while the migration to Vue is in progress. Once the migration is complete we will need to move the Vue tabs navigation to the sidebar before we can enable the feature flag.
Engineering implementation
It probably makes the most sense to move away from tabs and instead use Vue router. Then we can use links in the sidebar to change the content of the page without reloading it. We might need to use Vue portal to correctly position the Vue router links.
Edited by Peter Hegman