[sync schema] take care rdef may not be final, in which case we want to use type of eid attribute

[web action] has_permission_update checked implicitly by has_editable_relation, don't check it twice

[muledit] form may contains subforms with nothing editable that will be s kipped, so ensure we choose one with something to display when rendering table headers

[c-c i18n] namespace/line wrap cleanup + dynamically compute available language + make it works in installed mode

[i18n] no more necessary, those msgids are no more generated

[wf component] reversing selectors here may be a huge performance win on big rsets, since EntityVComponent selector starts with one_line_rset