Increase zIndex for tooltip visibility in GridTI component #53913
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Motivation
While there’s no issue at the moment, a z-index of 1 is too low for a tooltip and may cause visibility issues as more UI elements are added. For example, in PR #53216, new version indicators are introduced in the grid, which could potentially overlap with the tooltip.
Change
Tooltips typically use a z-index in the 1000–2000 range to ensure proper visibility, so this value has been increased accordingly.
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