[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

[htmlhelpers] notes about seemingly unused functions (remove for cw 3.4 ?), cleanup a bit

[formfields,formwidgets] move default size and maxlength from field to widget init (that is quite still unsatisfactorily)

for some reason, use of an anonymous function makes things more readable

ability to map attributes to something else than usual cw mapping on sql generation