In latest version we tried to get rid of drop-downs, where it was possible that huge list of values will be used in it, as it really caused performance issues on browser side.

But currently it's indeed not so easy to select single graph for viewing (Monitoring -> Hosts -> Graphs), so we have to use filtering, which is not so fast.

What if we could single click on a graph someway to select it to display as single filtered? That would be simplify frontend users life quite a lot.

Just a note - there is a limit of 20 graphs, see ZBX-17748, so it's possible that you have to use filters to type-and-find missing graph on the list, but that's another story.