[views] fix some crashers (schema still does not render properly, might be yams side)

[tabs] backport entity-less support for tabs

[js] shrink htmlhelpers, extract massmailing functionality, jslint

[primary] cleanup, render_entity -> cell_call

shrink a bit the tabs

[reledit] simplify a bit more

backport stable branch

[reledit] restore primaryview_display_ctrl usage by default in reledit (including bugfix over last implementation)

[web] cubicweb.widgets.js was missing in treeview

*gasp*

[tests] follow common.tags change

[reledit] remove buggy check, postpone functionnality to 344615

please html (non-xhtml) browsers # close 344205

[schema] fix yams' add_relation monkeypatching

merge

a warning for attemps to reledit the wrong side of a composite

[reledit] simplify, fixing #344545

consider primaryview_display_ctrl in reledit, XXX should split into reledit / autoreledit

new RelationTagsDict class, use it in uicfg where necessary

use msgid, update i18n

[skeleton] the new implementation of data_files will never raise a OSError

[formwidgets] let the textarea height be dependant on the actual content (up to a limit)

[reledit] allow composite edition if the composite is object

[js] small cleanup

[js] lint

oops

[reledit] do NOT propose to edit composite-related entities (unlinking would destroy the other side)

[formwidgets,formfields] hum, this way

merge

merge