cosmetic change display menu from 1.60 to 1/60 and extra menu 61

[joc2]

A other user make a cosmetic change in the display menu item from 1.60 to 1/60
so replace the . by / and it make sens.

and add tx power ajustable on radio.... menu 61 add......

the user : https://github.com/armel/uv-k5-firmware-custom-feat-F4HWN?fbclid=IwAR3JOpYUg0U1FP_YxwKxFj1YTomDh_vjK58GrYVp-IvnKVlER726hZLydo4