[diff flame graph view] Improve Auto-select logic

[grafakus]

Feature description

Is your feature request related to a problem? Please describe.

Context: this PR introduced the "Auto-select" button

This issue is a placeholder to find ways to improve the auto-selection:

• Idea 1: Auto-select should not behave the same if there are different filters in baseline & comparison: if the filters are different, selecting the whole time range makes sense, if they are the same, selecting half of the range makes more sense
• Idea 2: leverage machine learning (see the example of Explore Logs) to implement @Rperry2174's idea: "the auto-select button should pick the 5 minutes on either side of the lowest point on the baseline graph as the baseline. the button should pick the 5 minutes on either side of the highest pint for the comparison".

Describe the solution you'd like

See above

Alternatives considered

-

Additional context

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