Removing forced ltr and English from wb-tooltip-error-details

The error message appears to be internationalized now,
so it's wrong to force lang="en" and dir="rtl" on it.

This is a partial revert of my own commit:
I5a1b17d95b282a74ead42edb78f0febfecc26e34

Change-Id: I191f772a868c99e09eddd9c1190ff5234c28b84c