fix(ui): popup list controls overlap with table in list view (#13967)

### What?
- Fixes an issue where the table header row was overlapping menu items
in the ListControls component.

### Why?
- The overlapping occurred because the table lacked proper stacking
context, causing z-index rules to affecting the visibility and usability
of menu items in the ListControls component rendered above the table.

### How?
- Added the CSS property isolation: isolate to the table styles. This
creates a new stacking context, ensuring that the table header does not
interfere with overlapping UI elements

### UI Changes:
Before:
<img width="1357" height="730" alt="image"
src="https://github.com/user-attachments/assets/703f7bbe-0cd7-4dfb-a584-a6436a0ea5d7"
/>

After:
<img width="1357" height="730" alt="image"
src="https://github.com/user-attachments/assets/927c904a-4423-420b-ad4d-0a3c4624b5ee"
/>

Fixes #13941 

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Fixes #

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packages/ui/src/elements/Table/index.scss

@@ -5,6 +5,7 @@
     margin-bottom: $baseline;
     overflow: auto;
     max-width: 100%;
+    isolation: isolate;
 
     table {
       min-width: 100%;