"Add to dashboard" icon on every graph #17262

Summary

Currently to create a dashboard I need to choose specific section and graph type in order to add it to the dashboard. Sometimes they are hard to find. It would be a lot easier to build dashboard using graphs that I see on different tabs.

I'd like to have on every graph at the bottom left an icon saying "add to dashboard". A popup should show if there are mutiple dashboards available.

In v2 it could even allow to create new dashboard if I think it doesn't fit with whatever I have currently.