Filter argument for the preview view set to false

This prevent errors when rendering special char into html. With the filter argument to true, special char are encoded and so the json can't read it and no preview is displayed.

Can also be merged in Novius OS Dubrovka
Put result of primary_key() method into a variable

This avoid the notice : "Only variables should be passed by reference" that could appear here.
Bugfix for virtualpath

The virtual path was changed for all items without take in count the context. So you could change a url for a subpage "C" of a context by changing the virtualname of a parent page "A" of an other context (if the parent page "B" of the first context has the same virtual name than "A").

A simple example :
A is in context main.
B and C are in context second.
A and B have the same virtual name "ok.html".
C is the child of B.
You change A virtual name to "test".
C virtual name become "test/C.html" instead of staying "ok/C.html".
Bugfix translation viewForgeUncached
Merge pull request #104 from Foine/patch-6

Filter argument for the preview view set to false
Merge branch 'master/chiba2' into master/dubrovka
Merge pull request #107 from FredDubois/patch-1

Bugfix : set locale in rebuildCache
Cherry pick bugfix set local in rebuild cache
Merge chiba 2
Merge pull request #105 from Foine/patch-7

Put result of primary_key() method into a variable
Merge pull request #106 from Foine/patch-8

Bugfix for virtualpath
Merge branch 'master/chiba2' into master/dubrovka
Bugfix: save _context in cache
Merge branch 'master/dubrovka' into dev