View Mode: Reload saved dashboard on page refresh

[stacey-gammon]

Currently, if a dashboard is edited by Person A (e.g. they remove a visualization), and Person B, who is viewing that dashboard, then refreshes the page, they will continue to see the visualization. The only time the dashboard is truly refreshed is on an explicit open, not on page refresh. That is because we save edit state in the url, so if the user adds a visualization, then clicks another tab, then clicks back, their local edits will have been retained.

Once #9508 is checked in (view/edit mode), I think it would be more reasonable to reload the dashboard on a page refresh, though only when it is in view mode.

[stacey-gammon]

Pretty sure #62415 fixed this.