ecg: do not invert the signal

See merge request !44

main: Check for version 1.18

See merge request !43

ECG: Add streaming

See merge request !42

Card10BackgroundService: Check pairing when coming back from pairing dialog

See merge request !41

BatchTransferFragment: Super low effort progress indicator

See merge request !39

ConnectionService: call close() on connection when disconnecting

See merge request !40

ConnectionService: Always request the full MTU

See merge request !38

As we are creating new connection every time the button is pressed, we
need to discard the old connection objects

main: Show dialog if firmware version is outdated

See merge request !37

introduce background service

See merge request !36

add NO_BLUETOOTH state
be more careful when changing states
document state transitions

card10 uses this to automatically update its internal clock and time
zone.

feat: Display firmware version

See merge request !32

hatchery: Remove unused variable

See merge request !34

hatchery: Don't create app launchers anymore

See merge request !33

There is no need for them anymore since very early firmware revisions
and they pollute the root directly

Feature/nice mood and more beautiful

See merge request !30

- opposite of TOP is BOTTOM, not BUTTON

- use whole scren width
- use colors
- switched no-contact and off
  - so it's the same order as when switching the state on card10 with `(state+1)%5`
  - NO CONTACT/OFF is still easy to access with the thumb

Update the UI for the scanner fragment

See merge request !27