Feature request: More global settings

## Description
It would be very nice UX-wise if there were global settings for
- Use time-based X axis
- Metric
- Limit

## Use case
I like to always view my graphs (or most of them at least) with a time-based x-axis, with the metric "one rep max" and without limiting the scope to 20 values (I use 100 for maximum history) 