Design Exploration Editor

[kgodey]

• [ ] Use our colors, components, etc.
• [ ] Show clearly that we're editing an existing query
• [ ] Explain what "Based on [TABLE NAME[" means
• [ ] I want to delete the exploration from this page.
• [ ] I want to see more clearly that I have unsaved changes.
• [ ] I want to see an alert if I try to navigate away from the page when it has unsaved changes.
• [ ] Allow the user to navigate to the Exploration Page

Blocked by:

• #1653
• #1655