Ability to manage saved searches/visualizations from dashboard

1. As a Zaloni Developer | :

2. I want (Feature Details): to be able to manage(delete) saved searches and visualization in dashboards.

3. So that (Use case details): Unwanted or test templates can be removed.

4. Acceptance Criteria: (performance expectations, security expectation, etc..): Ability to remove saved searches and visualizations by authorized role.