Fix time range selection issue

[Spikatrix]

Fixes https://github.com/fluxninja/cloud/issues/8859

Summary by OpenAI

Bug fix:
- Updated TimePickerWithHistory component to track mounted state and update fnGlobalTimeRange only when it changes
- Modified TimeRangePicker value prop to use fnGlobalTimeRange if available

🎉 A bug we've slain, our code's now right,
With TimePicker updates taking flight.
Mounted state we track with care,
And fnGlobalTimeRange we now share. 🕰️

[github-actions]

🤖 OpenAI

Here is the final summary of changes:

This pull request updates the `Picker` component to improve its handling of global time range updates. It adds a reference to track if the component has mounted and updates `fnGlobalTimeRange` only when it changes. Additionally, it modifies the `value` prop of `TimeRangePicker` to use `fnGlobalTimeRange` if available.

Files	Summary
public/app/core/components/TimePicker/TimePickerWithHistory.tsx	The diff improves the handling of global time range updates by tracking the component's mount status and updating fnGlobalTimeRange only when necessary. It also modifies the value prop of TimeRangePicker.

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In the recent run, only the files that changed from the base of the PR and between 54feedf76d283171d23d92f4e17d3b937624ffcb and 1ab68dbd8f6dd8454273d7a520eb58732d553cde commits were reviewed.