Make python settings local only

This way, they will not trickle on other windows with C code etc.
Fix long line highlighting

Highlighting of long lines was too slow. This has been fixed by removing
unneeded triggers.

Also, the column size is now per Python standards (79 chars).
The standard instructs so because there are people that mark the EOLs in
their terminals with characters.

That's a big problem.
That's a real problem.
I even tried to explain that to a homeless couple near my street but all
they kept saying was "Fooood".

Hobos. I bet they use C too...