Update for Russian and Bulgarian translations

Translations of the "deco" tag.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Edit depth/duration dialog incorrectly always used metric

The label changed, but when the value was pre-set, it was always set as
metric (but then "correctly" interpreted as ft when reading it back - i.e.
it was incorrectly devided by 3.3).

Reported-by: Thomas Maisl <tom@maisl.net>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>