pdXML: make text comparison mode user-settable
pdTranslate: enforce binary text comparison mode

The speed increase - huuuuge.  Didn't expect such a big difference, but
wow, this is great.
Tool panel: fix misaligned quick-fix tool container
Language files: fix missing Undo History translation
Tool panel: increase white space for better translation results
Language Editor: switch to binary text comparison
Various language files: final 6.4 update

At least, I *hope* this is the final update, but based on past
experience, there will always be a few more surprises en route to
release.  :/