Add a "Select All" checkbox in multi-line graphs.

In Solarwinds NPM, there are a number of graphs, displaying multiple data in one graph, by means of colored lines. For instance like this graph:

@

To select only one-graph, you have to " uncheck"  all checkboxes, except the only one you need... After every uncheck action, the webpage has to be refreshed, so to uncheck all graphs, can be a very annoying, time consuming job.  The idea is to (re)introduce the "Select All" checkbox, that unchecks all boxes in one action....

I think many other SolarWinds users would greatly appreciate that !