[Dashboard] Cancel button in editors to go back to the dashboard without saving the changes

[AlonaNadler]

If a user gets to the editor from a dashboard and decides not to save the changes, there is no clear way to cancel and go back to the dashboard.
The back button will take them back without adding anything but we should have something Explicit since users will either miss it or won't be clear it doesn't save the changes. A cancel button would be a good addition in this case

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[AlonaNadler]

@ThomThomson @majagrubic playing more with the master. I really we need a cancel/return button. In some cases, I had to click 3-6 times on the back button if I created a panel and wanted to cancel and go back to my dashboard

[ThomThomson]

thanks for looking further into this @AlonaNadler. I agree it's totally needed, due to how the url handles state sometimes in these applications. I added a cancel button to my lens by value PR #70272.

[majagrubic]

I'm working on this now. Is the expectation that the "Cancel" button appears in all visualizations, or just when dealing with by-value visualizations? Ie. do we want to introduce it for the existing flow as well? @AlonaNadler

[AlonaNadler]

When coming from a dashboard it needs to show the cancel button.
The cancel button needs to show up in all editors (at least in Lens). When users create a new panel or when users open existing panels for editing they should see the cancel button.

[ThomThomson]

@AlonaNadler would it make sense to have the cancel button when coming from the visualize library too? And the cancel button would redirect back to the listing page?