CW Morse does not work with tlf

[Michael Black]

Thread collisions are causing problem with tlf
https://github.com/Tlf/tlf
tlf is making these calls
***2:rig.c(2333):rig_get_freq entered
****3:rig.c(2856):rig_get_mode entered
****3:rig.c(3315):rig_get_vfo entered
***2:rig.c(5757):rig_get_split_vfo entered

Perhaps using a MUTEX while send_morse is active and having these functions return cached info while send_morse is active?