DRILL-6432: Show Button to print visualized query plan (#1278)
* DRILL-6432: Show Button to print visualized query plan
Having the capability to only print the visualized query plan means the user can specifyi the zoom level (in the printer settings) when printing large complex plans that might span multiple pages.
* Update based on review comment
Padded button by 15px to avoid sticking to pane
closes #1278
