Improvement
You can now copy dashboard tiles to one or more other dashboards. Very handy for both duplicating tiles across your dashboards, as well as making copies to tweak within the same dashboard.
Just click on the settings icon (gear or cog) to open the Tile Configuration menu and click Copy tile, or mouseover the tile header and click on the clipboard icon. You'll be prompted to choose which dashboard(s) (of the dashboards you own and have edit rights to) you want to copy the tile onto.
