fix: possible fix for the cell losing focus when clicking on the border

[sharath-1517]

Fixes #2987

Technical details

• Found that the cell was given box-shadow for the [data-active-cell] element.
• I have changed the box-shadow to outline and set outline-offset in order to make sure that the outline stays inside the cell avoiding overlaps with other cells.

Screenshots

• Active state of the cell

• Inactive state of the cell

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the develop branch of the repository
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• My code follows the established code style of the repository.
• I tried running the project locally and verified that there are no
  visible errors.
• I added tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).

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