[explore] add chart to a selected tab on save to dashboard

[junlincc]

"It would be great if I can choose which tab to add a chart to dashboard to rather than dropped in the first page."
And “nice-to-have” choose “add to top” or “add to bottom.

[srinify]

Love this and strongly agree! Having worked on at least 10, multi-tab dashboards .. being forced to hunt down the tab the chart dropped into and drag it into the tab I actually care about is an annoying pattern!

[mihir174]

Yup I think this is a great idea. I also figured if we do the bonus of adding to the bottom or top of a tab, we could provide the same option for adding to a dashboard in general