T&D Thermo

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Added support for the TR4A and TR4 Series.
Added the following items to the Settings Table:
- Recording Status
- BT Version
Fixed a problem where an error message was not displayed when entering a wrong Bluetooth Lock passcode for the TR7A.
When setting a Bluetooth Lock passcode for the TR-7wb/nw/wf, the passcode is no longer visible during entry.
Fixed a problem where the device name could be set to blank in Name Settings for the TR-7wb/nw/wf.
Improved the precision of the graph display.