Fix #1794 "FB: Order of apps in new dialog is random"
For #1794: also sort form names
#1796 "Filter returns blank page navigating to .xhtml page"

- filter "If-*" headers in the incoming request
Implement #1720 "Option to remove Orbeon version number everywhere"
Fix #1803 "fr:fields-date/fr:dropdown-date: use oxf.xforms.format.input.date"
Fix #1804 "Spinner doesn't show properly in Liferay"
Fix #1736 "Propagate request parameters between edit/review/pdf"

- new `open-pdf(lang = "lang")` action
- remove unneeded `append-query-params()` function
- `fr-pdf-model`: simplify, move and use process
- minor clean-up
Don't use spinner for Edit/Review buttons
Implement #1735 "Ability to pass custom parameters to persistence layers"
For #1724: Fix unit test after 7f7d6c8186b5609a853a4074e225328c6d40b095