Adding support for the Radiomaster TX15 and other 480x320px color screen radios

[dzaro-dev]

ADDING SUPPORT FOR 480x320PX RADIOS

This PR is about adding support for the Radiomaster TX15 and other radios with 480x32px radios, fixing some minor bugs with compass graph.

The original script works on the TX15 when compiled on the radio, but it doesn't extend all the way to the bottom.

To avoid changing the png images, I kept everythinga the top to be the same and I only adjusted things at the bottom. of the script (the blue background part).

In summary I have adjusted the vertical spacing of things, added a little "S" at the bottom of the compass (since there is now space for this) and generally tidied up some minor thing.

I also fixed what looked like a bug to me. The bottom line of the triangle from the compass was left as "GRAY" and I changed that to be the same color as the text and the other two lines of the triangle.

Here is a picture of how the final result looks like:

It might not be perfect and the vertical space that is left could potentially be used in a much better way, but like this the script is the same for all radios.

I was thinking of adding an entire new row with other useful information, but for now, this is OK.

If you have any questions or suggestions, let me know.

[maganaluis]

This worked, but there might be a bug. When I tried it with the latest firmware TX15s Factory Firmware - Update 04 (Build e5c3f410) I switched to the page with iNav and started getting constant messages "ready to arm". So there might be a bug?

Or perhaps when I overwrote the files something got mixed up. Let me know, I could restore a back up and try again.

[dzaro-dev]

@maganaluis I haven't had this issue before, so it might be an isolated incident. Mine is running smoothly for months now.

Plus, I didn't change anything about the audio code, so it shouldn't have anything to do with it.