Adding a pedantic version of transl

[Paul Vriens]

Hi,

Currently transl doesn't show potential translation errors on a higher 
level. I'm busy implementing a more pedantic version of transl that 
shows the potential translation errors on the resfile pages (see 
attached screenshot).

I'm now looking for the best way to get into pedantic mode. Will a 
simple link on that page do? It will always show a link to the other 
mode of course.

We don't want this on by default as there are a lot of false positives, 
just think of all those "OK" buttons and it will take some performance 
to present this.

Once this is dealt with I will start with a pedantic mode on an even 
higher level (the lang page). This however only if it doesn't take too 
much of a performance hit.