Network/Wi-Fi: improvements

- Always check for ethernet status every 30s. Should not affect battery
life.
- Less aggressive scan intervals to give more times for slow adapters.

Modules/Bar/Widgets/WiFi.qml

@@ -40,6 +40,6 @@ NIconButton {
       return "signal_wifi_bad"
     }
   }
-  tooltipText: "Network / Wi-Fi."
+  tooltipText: "Manage Wi-Fi."
   onClicked: PanelService.getPanel("wifiPanel")?.toggle(screen, this)
 }