[Accessibility][Toolbar] The toolbar does not follow the established design pattern

[jmbuss]

Describe the bug

Standard: 4.1.2 Name, Role, Value (A)
Affected Groups: Screen Reader Users, Keyboard Users

Notes and Advice
The dashboard toolbar does not follow the established design pattern.

The dashboard toolbar has the following issues: No accessible name (fails SC 4.1.2 Name, Role, Value)

Recommendation
Provide an accessible name for the toolbar container using aria-labelledby (if there already is a visible heading or label), or aria-label (if there is no visible label).
If there is more than one toolbar on the page, use aria-label to give each a unique accessible name.

1. We should have a container which labels the widgets toolbar
2. We should have a container which labels the dashboard actions (save / preview)
3. We should have a section which labels the dashboard query configuration (asset model select view mode only / viewport picker)

Acceptance Criteria
The above violation is mitigated