[tabbed view] make tabs optionaly lazy: lazy=False on the tabbed view trigger synchronous tabs. Closes #2443038 This is useful for tabs holding a self-posted form for instance.

[web form] refactor Form.__init__ so that extra kwargs are set earlier in the process. Closes #2443040 (eg if you want to use them in .session_key)

[test rql completion] dont limit number of completion, else we've impredicable results. Also should tell rql.parse to not print error on stdout This repairs test introduced by dcd9bc1d1bca which closes #2439846