[REM] 4-spaces indent for web view pretty-print-before-save routine

Didn't quite work right: on the layout, it would exponentially increase
leading spaces in text nodes. Combined with a bug injecting snippets marks in
the footer (and thus invalidating and re-saving the layout at each snippet
addition) this could blow up the layout template and rendered page to >20MB.

Just keep lxml's standard 2-spaces indent.

LXML is unable to pretty print the layout anyway.
Launchpad automatic translations update.
Launchpad automatic translations update.
[FIX] last version of wkhtmltopdf expects all file to have a doctype, inject one if not present
[FIX] don't mark view sections as dirty just because the snippets thing has inserted drop zones in it
[FIX] sale: trigger signal manual invoice for make invoices wizard (not advance)
[MERGE] Forward-port of latest 7.0 bugfixes, up to rev. 9925 revid:dle@openerp.com-20140324103427-yckncrnynvs5si8i
[MERGE] Forward-port of latest saas-2 bugfixes, up to rev. 9159 revid:dle@openerp.com-20140324104743-ubvu8st7emq9pg1q