[13.0.0-beta.8] BUBBLE_LABEL_DEFAULT is unused, English is hardcoded

[microbit-matt-hillsdon]

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Description

The bubble implementation hardcodes the English 'Bubble' as the fallback label. 9a01417 introduced BUBBLE_LABEL_DEFAULT for this purpose but didn't actually use it.

Reproduction steps

Priority

Not important for MakeCode we won't hit this, just noticed in passing.

Stack trace

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