[Sub-GHz] UI/UX improvements

### Describe the enhancement you're suggesting.

Add battery and time views on the screen bar inside Sub-GHz app, add numeration for captured signals and rearrange screen elements.

Something like this:

4/55               13:44    43%

1-Nice Flor-S
2-Came
3-Nero Radio
4-Doorhan

433.92    AM650

Config            Exit



### Anything else?

_No response_