Fix for initialImageIndex mismatch issue for loading SR after disabling prompts

[ashik-trenser]

Context

• After disabling the prompts, the initial image calculation for the SR issue was fixed.
• This PR has been incorporated by FlyWheel.io.
• Close [Bug] Initial image index for SR is not calculated correctly while loading SR after disabling the hydration prompt. #4731

Changes & Results

• Added initial image options to the viewport options while setting the displaysets from trackedMeasurementsContext.tsx file in order to get the initailImageIndex to be loaded after loading an SR after disabling the prompts.
• Added a null checking in WindowlevelActionMenu inorder to prevent the error displayd while loading the SR after disabling the prompts.

Testing

Initial image is correctly loaded now after disabling the prompt and loading the SR.

Checklist

PR

• My Pull Request title is descriptive, accurate and follows the
  semantic-release format and guidelines.

Code

• My code has been well-documented (function documentation, inline comments,
  etc.)

Public Documentation Updates

• The documentation page has been updated as necessary for any public API
  additions or removals.

Tested Environment

• OS: Windows 11
• Node version: 18.19.0
• Browser: Chrome 132.0.6834.110

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[ashik-trenser]

@sedghi
Could you please make these changes available for 3.9 after this gets approved? Thank you.

[sedghi]

see my comments thanks