[INV-3589] Turn off WMS layers when Network offline

[LocalNewsTV]

Overview

This PR includes the following proposed change(s):

• Set WMS Layers to the default value of DEFAULT_LOCAL_LAYERS (All offline) when user not connectedToNetwork.
• Hide WMS options from LayerPicker when not connected
• Create Alerts for when Network status toggled
• Slight expansion on AlertsSubjects enum to have Network
• rename file constants/alerts/alertMessages -> constants/alerts/mappingAlerts, update imports
• create file constants/alerts/networkAlertMessages to hold Network related alerts
• Closes #3589

Images

WMS Layers Disabled in Picker

Alerts + Icon

Testing

• Monitored Network Requests while panning map when Network was online/offline
  • when offline, no additional requests made

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
0.0% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud