Add support for Bluetooth Seika Notetaker devices (PR #13191)
Fixes #13142
Summary:
Seika Notetaker devices are: MiniSeika (16, 24 cells), V6, and V6Pro (40 cells)
They can now be autodetected via Bluetooth.
Bluetooth COM port can now be manually selected.
Description of changes:
- Identify the Seika notetaker device when connected by Bluetooth as per #13142 (comment)
the Bluetooth name should be TSM, a space, then 4 digits.
- Clarifies user guide for Seika devices.
