Deinit everything when restarting bt standalone temp sensor

[will-v-pi]

Without this, I get an error when attempting to reconnect after a restart by pressing the S key:

Connecting to device with addr DE:AB:01:06:C1:6F.
SERVICE_QUERY_RESULT, ATT Error 0x7f.
Disconnected DE:AB:01:06:C1:6F
Connecting to device with addr DE:AB:01:06:C1:6F.
SERVICE_QUERY_RESULT, ATT Error 0x7f.
Disconnected DE:AB:01:06:C1:6F
...

With this fix everything works correctly when starting & stopping using the S key

I'm not sure if everything needs to be deinit'ed, but it is probably safest to deinit all three of these as they are init'ed above

[will-v-pi]

@peterharperuk Do you want to absorb this change into your larger PR #743 - or should I merge this separately?

[peterharperuk]

It might be quicker if you merge this first. I can make sure this change is picked up in there

[will-v-pi]

Sounds good - I'll merge this now then (once the CI is done)