[BUG(ish)] Text entry in text fields in RPN mode

[orcinus]

I was wrong (shouldn't post late at night without checking on the actual calculator first), the second example actually should've said:

'SIN '

So no parentheses, extra space, but single quotes (i.e. it defaults to algebraic input, but actually plops the RPN syntax function in there).

I'm pretty sure it's intended behaviour too (hence the "ish" in the thread subject), but it's a bit inconsistent from a UI/UX point of view.