[pkg] prepare 3.17.16

[reledit] Fix reledit icons jumpiness (closes #4106867) Introduce an "invisible" class (copied verbatim from Bootstrap) that only sets the "visibility" property. "display: none" is the reason for the whole jumpiness as it actually detaches the element from the rendered layout. "visibility: hidden" only makes it transparent while keeping its original box properties (width, height, etc).

[views] Replace poorly named "invisible" class with "list-unstyled" "li.invisible" actually means "hide bullet". Use a reasonable name instead, such as bootstrap's "list-unstyled" class. This patch also changes the DOM element the class is applied to. "li.invisible" had to be enabled on every "li" tag, whereas the "list-unstyled" class only needs to be applied to the parent "ul" element.

[views] a 'div' with 'display: inline' screams 'span' (grafted from af6e3db801fcfbd6f562c4a7cfdc89f187042792)

[pkg] remove simplejson dependency We no longer use it, the stdlib's json module is fine.

Added tag cubicweb-version-3.19.2, cubicweb-debian-version-3.19.2-1, cubicweb-centos-version-3.19.2-1 for changeset 8ac2202866e7

[pkg] Fix version number Note to self: don't phase -p before coffee.

[pkg] 3.19.2

[webtests] finish to give all self.view(....) a req=req parameter

[tests/syncsession] use the new connection api