Feature: Need an indication that Write Tag is finished

[Rich-b1]

OpenSpool version: 1.18.0

1. Using Sliders and Selections input Filament tag data.
2. Press 'Write NFC" (I suggest this should be something more friendly, perhaps "Create Tag" or "Write Tag")
3. Notice, that unless a user is watching the log window in their browser, there is no indication on the OpenSpool device that the write was performed.

I suggest an LED color or sequence that's different than others. Perhaps two yellow blinks? One at start of the write sequence, and then other blink at the finish of the write sequence, this is to alert the user to wait until the write is finished.

If a failure to write for some reason, perhaps blink yellow-red-yellow?

After the tag is removed, the LED can return to the normal color (white)

[spuder]

Yes this is a good idea. This should be added.