timezone variable fix

Hello,

The app watchmaker forceclose when using undocumented (thus correct) timezone expression such as {tz1dhz}. Actually it would be a real plus if we could have the same kind of expressions available for the native timezone and the 3 others extra. Would it be possible to have a tab view on top of the expression list to choose which timezone we want ?

More quickly, i'd like to use {tz1dhz} as well as an unavailable one which would be the timezone diff {tz1o} as a numeric value for calculation.

I think the last one can be done very quickly :)

Thanks,

Julien, an happy customer !