Description of problem:
It is impossible to graph multiple data-series in Ad-hoc Metrics if they are on different pages.

Version-Release number of selected component (if applicable):
5.8.0.17

How reproducible:
100%

Steps to Reproduce:
1. Search metrics in Ad-hoc Metrics

Actual results:
If the list of found metrics is large and they are split in multiple pages it is impossible to select metrics from different pages to graph them together.

For me in the specific, using the filter "hostname: ocp-c08-compute01", it was impossible to graph "machine/ocp-c08-compute01/filesystem/available//" (in page 1) together with "machine/ocp-c08-compute01/filesystem/limit//" (in page 2).


Expected results:
It should be possible to select multiple data-series from different pages and graph them together.