feat: floating button for scroll on booking page for mobile

[Shaik-Sirajuddin]

What does this PR do?

This PR introduces an idea to add a floating button for scroll on mobile , to remove the need for scroll between calendar view and time slots in booker page on mobile devices

• Fixes [CAL-3694] Remove need to scroll when booking meeting on mobile #14242
• Fixes CAL-3694

video6300788693351272820.mp4

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected)
• I have added a Docs issue here if this PR makes changes that would require a documentation change
• I have added or modified automated tests that prove my fix is effective or that my feature works (PRs might be rejected if logical changes are not properly tested)

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"Add community label" took an action on this PR • (06/15/24)

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[PeerRich]

I think a better approach to make the issue creator happy would be to make the top half sticky after scroll and keep it visible:

and then only scroll the times below

[Shaik-Sirajuddin]

@PeerRich
This sounds a nice approach
Will implement it in this PR