[Bug/Enhancement] Apply Settings fails intermittently when no network adapter is explicitly selected

[simryang]

Summary

When a device is found in search without explicitly selecting a network adapter,
applying settings succeeds only ~30% of the time (fails ~7 out of 10 attempts) (from Alan).

Steps to Reproduce

1. Launch the Configuration Tool
2. Do not select a network adapter from the adapter list
3. Search — device is detected successfully
4. Modify a setting and click Apply
5. Result: setting is not applied in ~70% of cases

Expected Behavior

If a device is detected without explicit adapter selection, Apply Settings should
work reliably in that same state — no manual adapter selection should be required.

Actual Behavior

Setting application is unreliable (~30% success rate) when no adapter is pre-selected,
even though the device was found successfully in the same network state.

Workaround

Manually select the network adapter before clicking Apply. This resolves the issue.

Impact

Users who find devices without selecting an adapter expect Apply to work consistently.
The inconsistency causes confusion and repeated failed configuration attempts.

Suggested Fix

When Apply is triggered, if no adapter is explicitly selected but a device is currently
active, automatically determine and bind to the correct network interface used during
device discovery.