Add simplified tuning page

[klutvott123]

Simplified pid and filter tuning.

For testing:
betaflight-tx-lua-scripts_1.5.0.zip

Closes #355

[krisdover]

Thanks for implementing this @klutvott123, however when I tried to use the scripts from master the new simplified_tuning page didn't show up on my radio. I noticed it wasn't added to the list of scripts to be compiled in BF/COMPILE/scripts.lua, was this an oversight?

[klutvott123]

@krisdover bin/build.sh has to be executed to build the scripts and generate the scripts.lua file. Try downloading the latest nightly build from here https://github.com/betaflight/betaflight-tx-lua-scripts-nightlies/releases and it should work

[klutvott123]

Also keep in mind that you have to be running Betaflight 4.3 for this page to show up. There has been a lot of changes to simplified tuning and this version of simplified tuning is outdated if using the latest 4.3 master. The latest changes haven't been merged yet #399

[krisdover]

Ah, yes I just realised the dependency on MSP protocol changes in the Betaflight firmware. Makes sense now thanks. One other thing I noticed was the first line of the simplified_tuning.lua script references a file of a different name:

 local template = loadScript(radio.templateHome.."simplified_pids.lua")

Might not be an issue (as I'm not a lua developer) but just thought I'd point it out :)

Thanks again for adding this feature, it's something that I felt was lacking since I fell in love with the tuning slider functionality in BF 4.1 👍

[klutvott123]

local template = loadScript(radio.templateHome.."simplified_pids.lua") this is a mistake. The template filename should match the name of the page filename. We're not using custom templates for any pages so this hasn't caused any problems yet, but thanks for pointing it out. I'll take care of it 👍

For earlier BF versions the tuning sliders were done in the configurator. In BF 4.3 it's done in the firmware itself and that's how we're able to do it in the lua scripts now.
if you decide to try out BF 4.3, I have just uploaded a test version of the lua scripts with updated simplified tuning support in this PR #399