Description & tagging on dashboards

[paolodamico]

Changes

This PR adds more stuff from #3344 & #3551. Please view original issues for motivation and context.

• Allows adding descriptions to dashboards to better provide context on each dashboard.
  
  
• Allows tagging dashboards for easier organization (includes autocomplete, duplicates prevention, loading states, ...).
  
• Tags are shown on dashboard list too and can be filtered on.
  
  
• Descriptions are shown when publicly sharing a dashboard.
  
• Empty state when you don't have any tags registered.
  
• Adjusts relevant instrumentation accordingly.

Checklist

• All querysets/queries filter by Organization, by Team, and by User
• Django backend tests
• Jest frontend tests
• Cypress end-to-end tests

[paolodamico]

@jamesefhawkins this seems like a feature geared towards collaboration, should we make it a premium feature? I'm worried it's just a tiny thing that will cause more complexity (UX & code) than what is worth. Thoughts?

[paolodamico]

UX question for @corywatilo, opted for allowing direct changes to tags without entering edit mode, wdyt?

[macobo]

Added some minor nits, did not go through the whole flow though

[jamesefhawkins]

@jamesefhawkins this seems like a feature geared towards collaboration, should we make it a premium feature? I'm worried it's just a tiny thing that will cause more complexity (UX & code) than what is worth. Thoughts?

I definitely think this has to be paid so that we can keep giving a ton of functionality to free users whilst building a real business at the same time. Collaboration-related features like this definitely aren't needed for 1 person, but for a team of more than a couple (thus a company, with money involved) are really important.

I can see how this is annoying code-wise, but this will happen repeatedly, so we need to find a way to do easily if we can?

[paolodamico]

Makes sense @jamesefhawkins, will make it a paid feature, we do have a way to handle this that is fairly simple to implement, it's just something we'll have to mind when we make changes to this feature.