* simple-ui: fix flaky OAuth2TokenManager bean creation
* simple-ui: add Assigned / installed tab
This is inspired by the original hawkbit interface; however, as we've got more space it merges both Assigned and Installed into the same tab
* simple-ui: add assign and unassign to targets, and create tags
* simple-ui: add action history tab
This allows tracking the actions, see their status, and cancel / force / force cancel them; just like the previous ui
This has some limitations though; the previous UI had access to the Action's main class, whereas we're dealing with the rest dto; hence we're missing some information to make the ui simpler to create.
* use textblock with generic line-separator
* fix tags not shown due to missing badge import
* improve the action's status by combining the four statuses into one icon
