Refactor BHI160 App

This MR makes the BHI160 app more pythonic and fixes a few bugs/issues:

• An exception (including KeyboardInterrupt) will trigger the sensor to be closed again. Otherwise you'd get strange behavior trying to reopen then afterwards.
• Use simple_menu.button_events() instead of home-cooked solution. This should hopefully make the code more future-proof.
• Fix overlapping text caused by the font-rendering changes.

changed milestone to %v1.11

added 3 - Preload 6 - Needs Review labels

cc @xiretza, want to take a look again? ;)

Looks good to me! Thanks for keeping our codebase clean.

However, I'm only a bot - so a human will still have to approve this request.

TIL about contextlib.ExitStack, that's awesome. I also like the way orange is calculated :D Looks great overall.

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• d8f3f55e - refactor(preload/bhi): Make app more pythonic

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resolved all threads

added 6 - Needs Testing label and removed 6 - Needs Review label

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• f4755f4b - refactor(preload/bhi): Make app more pythonic

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resolved all threads

mentioned in issue #168

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• f4755f4b...1798ca80 - 3 commits from branch master
• 1b890d8b - refactor(preload/bhi): Make app more pythonic

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• 060471d8 - refactor(preload/bhi): Make app more pythonic

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assigned to @rahix

The MR is ready to be merged, but I will hold off until the I2C race which is triggered by this is fixed (the upstream version also triggers it, but not as quickly).

resolved all threads

mentioned in issue #169

I'd merge this after setting the xQueueSend timeout to zero as a quick fix. After all, the stale data from full queues will only hit applications that ignore the data they have explicitly requested, and then it is their own fault anyway.

No need to block on #169.