Add config option to force module to always boot into the menu

[chrisib]

Some users may find it desirable to have the module always boot into the menu, rather than automatically re-launching the last-used program, and then needing to reset the module to get back to the menu.

This adds a new europi_config field called MENU_AFTER_POWER_ON that, when set, automatically clears the BootloaderMenu's saved-state upon launching a EuroPiScript. This will force the module back into the menu state on the next power-up.

The new field defaults to False, so the default behaviour is preserved; this just adds the option to force the menu to start if desired.

[roryjamesallen]

If this all works on a module then it lookg good to me! Really useful change that I'll definitely be using for the module I use for testing

[chrisib]

If this all works on a module then it looking good to me! Really useful change that I'll definitely be using for the module I use for testing

I've got my one module set up to use this (also finding it helpful for development & testing!), but getting confirmation from 1-2 other users would probably be helpful just to make sure.

[chrisib]

Question: should we also automatically go back to the menu if the last-run program was the calibration tool?

I know we've had a few support questions (including from me!) where after building & calibrating the module, you power-cycle it, and it goes back to calibration instead of the menu. Given that calibration is a "once-and-done" script, as opposed to something users are likely going to want to run every time their module powers on, I can see a good argument in favour of making that change.

[roryjamesallen]

Changes look good to me now.

Question: should we also automatically go back to the menu if the last-run program was the calibration tool?

I think that's a good idea, there's no situation where someone would want to recalibrate immediately after calibrating other than if they messed up the calibration, in which case they can just re-enter the mode.

[chrisib]

Added the case for the calibration tool. I see there's also a BootloaderMode -- should that be handled the same way as Calibration?

[roryjamesallen]

Added the case for the calibration tool. I see there's also a BootloaderMode -- should that be handled the same way as Calibration?

Nice, the bootloader_mode script already removes the save state

[roryjamesallen]

Accidentally approved from my work account, but this all looks great now