Provide a utility helper view_context#sanitize_hash

Primary use case: to sanitize Pages#preview input.
Add specs for sanitize_hash helper.
Allow failures in jruby because it is so unreliable.

Make sure to check them though.
sk translation for refinery:form
Merge pull request #1851 from keram/sk-cs-translations

sk translation for refinery:form
Move changelog entry about #1847 to 2.0.6 section.
czech translation and bugfixes in slovak
Update core/lib/generators/refinery/form/templates/config/locales/cs.yml

Czech form translation review
Merge pull request #1 from simi/sk-cs-translations

Update core/lib/generators/refinery/form/templates/config/locales/cs.yml
Merge pull request #1855 from keram/sk-cs-translations

czech translation and bugfixes in slovak
Remove extra javascript content blocks.
Before trying to merge tmp locales check if the tmp file is actually there because engine and form extension have different locale files.
sk translation for engine generator
Merge pull request #1856 from keram/sk-cs-translations

sk translation for engine generator
Sanitize form message before stripping tags and truncating it.
Don't test admin dashboard stuff in resource request specs - just stub Refinery::I18n.
Made changing page parts documentation consistent.
Sanitize part.body in page_part_field partial.
Merge pull request #1842 from resolve/remove-extra-javascript-content-blocks

Remove extra javascript content blocks.
Use content_for? (instead of content_for) to check if any content has been captured.