Added BT pause function
Added Heart Rate Interval function
Added scrollbar on main frame

Replaced APPBT_HEART_RATE_CONF with APPBT_HEART_RATE_INT
Replaced APPBT_INDICATION with APPBT_INDICATION_DEV
Replaced APPBT_STATUS_MSG with APPBT_MEASUREMENT_PAT


Following message tags are now sent wo/timestamp to support interleaving with buffered messages:
APPBT_INDICATION_DEV
APPBT_SERIAL_NUM
APPBT_FW_REV
APPBT_BAT_VOLTAGE
APPBT_OVERRUN