Add metric filter by time range

[DemuraAIdev]

What would you like to be added?

Add time filter for metric

Why is this needed?

this really needed for see for past metric stats and

trends about metric

[mosenturm]

This feature is really necessary. Especially when monitoring memory usage, you often need to monitor data over a longer period.

[robertobandini]

I agree! Thank you about reporting this!
I thought there was already a request like this, but if there is, I can't find it right now.
Anyone is welcome to contribute, and it's now also possible to crowdfund features.
https://github.com/freelensapp/freelens/wiki/Fund-an-issue-or-earn-money-by-developing