fix: tooltip positioning near edge [FC-0062]

[rpenido]

Description

This PR fixes the tooltip positioning rule to avoid rendering it outside the window/iframe.

Before

After

Additional Infomation

• Part of Indicate library-sourced content (Authoring MFE - Unit Page) frontend-app-authoring#1463

Testing Instructions

1. Open the Unit Outline in the course authoring MFE
2. Open the browser console and edit the DOM adding a data-tooltip attribute to any element near the left edge of the screen like the example below:
   
3. Put the mouse over the element an check if it is rendered inside the screen/iframe limit
4. Repeat the process with an element near the right edge

---

Private ref: FAL-3941

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[pomegranited]

👍 Thanks for this fix @rpenido ! Works great.

• I tested this using the PR test instructions and a Library Content block in the new Unit outline view.
• I read through the code
• I checked for accessibility issues by using my keyboard to navigate -- wasn't able to see the tooltip using my keyboard only, but fixing this is outside the scope of this task.
• Includes documentation
• User-facing strings are extracted for translation

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX staging environment in preparation for a release to production.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.

[edx-pipeline-bot]

2U Release Notice: This PR has been deployed to the edX production environment.