Revert "feat(templates) Add support for plone.formwidget.autocomplete 2.0"

I am going to do some changes on autocomplete which I can't finish
right now and I fear it might take longer, so I'll revert
autocomplete and this one for now.

This reverts commit af354850969a1865daa21385bcad51aa6d8c30f0.
Ignore missing values

Content objects can go away or the content of a source may change. Don't
throw an exception in this case.
Display a select field if there are too many libraries for formTabs
Sort language library by language
Merge remote-tracking branch 'origin/master' into configurable_libraries

Conflicts:
	docs/HISTORY.txt
	plone/formwidget/contenttree/input.pt
Revert "add translation: display of default pages (boolean index bug)"

This reverts commit 52faac0ae29acff115b5cb1e97d2944325db2846.