[diff flame graph view] Add a time range sync button

[grafakus]

Feature description

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

It's currently difficult to quickly select the same ranges on both the comparison and baseline time series

Describe the solution you'd like

Add a "Sync time ranges" toggle, like we have in class Explore:

Once activated, whether the user is in the "Time picker" or "Flame graph" selection mode, both selections are in sync.

Alternatives considered

Describe alternatives you've considered

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Additional context

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