Combine visualization of Network status with Network health

[bkoelman]

Combine Network health display with NetworkGrid (the variant displayed on MainForm) and make it visually more appealing.

Possible errors to show, not specific to a device:

• not connected to mediator (possibly caused by protocol mismatch)
• mediator status nonzero (possibly unconfigured mediator)
• not compliant to class (typically: missing device in role XXX)

Possible errors that are device-specific: (maybe blink an error icon in front of device)

• misaligned sensor
• unsynchronized clock
• off-line (during run only)

Another approach would be to show all conditions needed for a run to start. Something like:

• Keypad: OK
• Start Timer: OK
• [ Intermediate Timer 1: OK ]
• [ Intermediate Timer 2: OK ]
• [ Intermediate Timer 3: OK ]
• Finish Timer: ERROR
• [ Delay between Start/Finish (single sensor): OK ]

where status value is one of:

• OK (Green check mark icon)
• WARNING (Orange triangle icon) - low battery / weak signal
• ERROR (Red cross icon) - device missing