merge back stable change

remove stale debugging statement

[server] fix integrity checks that destroy data (closes #1972842)

[entity related rql] 'is' relation target constant should have 'etype' type, not String

[entity] fix dumb name error introduced by 3.14 entity refactoring

backport stable

[js] missing trailing comma

[test] map pgettext to unicode as _

[table view] fix bug introduced in 7938:80c6e2155c3d leading to not translated table headers

oops

[test] fix some failures recently introduced

add missing imports

[selectors] match_kwargs and match_form_params selectors both accept a new `once_is_enough` argument (closes #1990438) also fix docstring of match_exception and references to selectors in the book.

[cache] replace lgc.cache with something more appropriate (closes #1921713)

merge and fix cubicwebSortValueExtraction pb which disappeared when tablesorter.js has been updated

[table] use explicit add_onload() to setup table sorting (closes #2013493)

[schema display] display_name shouldn't call .lower(). Note the only proper way is to have different msgid for upper/lower cases. Closes #1105433

[ms repository] when an exception is raised during extid2eid and no rollback is done, some manual cleanups have to be done (closes #1993420)

[facets] on the way to vidargs removal our roving on the table view, which leads to introduction of this feature, proved it was not the way to go.

[migraction] fix cmd_change_attribute_type command (closes #2015073) use dbhelper to avoid issuing unsupported SQL

[action] has_editable_relation first argument is once_is_enough flag, not an action name

[table] Only apply sorting event on the first row of a table header (closes #1988780) We use the new selectorHeaders from table-sorter 2.0.5

[table js] Update jquery-tablesorter to 2.0.5 (closes #1989018) The cubicweb specific code is moved to the table view. This version add a new useful option for #1988780

init_facets: Add documentation init_facets is not included in the default sphinx documentation but this docstring should help people digging into cubicweb core. This could go in an Advanced developer section of the book.

[facets] try to get rid of arbitrary constants, be prettier and eat less space (closes #1988706)

[edit controller] add form to pre_web_edit signature to ease linkto usage (used by vcsfile cube)

pylint extension

[printers] fix bug introduced by final view refactoring:   shouldn't be escaped. Also remove some msgids which should have been removed during this refactoring

Add a hidden input:submit field in facets form (closes #1988784) <Enter> is supposed to submit the form only if there is a single input:text field. However most browsers will submit the form on <Enter> anyway if there is an input:submit field. see: http://www.w3.org/MarkUp/html-spec/html-spec_8.html#SEC8.2 Firefox 7.0.1 does not submit form on <Enter> if there is more than a input:text field and not input:submit but does it if there is an input:submit. IE 6 or Firefox 2 behave the same way.

AnyRsetView: Refactor the columns_name method and update doc. We drop the 'label_column_%s' % colidx pattern and add a clean column_label method that might be overwritten by children class to alter the way default columns headers are computed.