Fix Admin feedback filter overflow

[TheSentinel454]

Why

Long community hostnames can make the native Community select exceed the Admin feedback filter grid, pushing the Received and Status controls outside the filter bar and creating horizontal overflow.

What

• Allow filter labels and selects to shrink within their grid tracks
• Add a browser regression test covering an unusually long community hostname

Risk Assessment

Low — this is limited to Admin feedback filter sizing and preserves the existing desktop and mobile grid layouts.

Before

The Community select expands past the filter bar and pushes the Received and Status controls outside it.

After

Long community names remain contained, keeping all four controls inside the filter bar.

References

• Verified on Blox at the local checkout revision: Admin checks passed and all 9 Playwright tests passed

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