Bug 504674

Summary:
When modifying a network profile/interface (e.g., setting a static IP, changing DNS servers, etc.) in KDE's Network settings and pressing **Apply**, the settings are saved to the profile, but **they are not applied to the interface** unless the user manually disconnects and reconnects the interface physically or through the applet.

This behavior is confusing and unintuitive, particularly for users coming from Windows where pressing "Apply" restarts the interface and immediately applies the new configuration.

Steps to Reproduce:
1. Open KDE System Settings > Network > Connections
2. Edit a connection and set a static IP address
3. Click "Apply"
4. Observe that the active connection keeps the old IP address until manually disconnected and reconnected

Expected Behavior:
The interface should automatically be restarted upon pressing "Apply" so that the new configuration takes effect immediately.

Proposed Solution:
Automatically restart the target network interface when new settings are applied

This would bring KDE in line with the behavior seen in other operating systems, improve usability, and reduce confusion for users.

Thank you!