fix #615379 by checking admin user exists instead of making think everything is fine

cleanup, typos

[form] fix #719285, due to multiple calls to restore_previous_post, by proper refactorings * move __init__ code from FieldsForm to Form. Must behaviour here should actually be in the Form base class * avoid buggy duplicated call to restore_previous_post * move some code that was in the form renderer to the form'__init__ method (__redirectpath & __form_id hidden input handling)) * 'formvid' should now be specified on form selection, not on form rendering

[fix] Apply fulltextindexed change in the actual index Change of the fulltextindexed attribute of a CWAttribute did actually change anything for already existing entity (but apply to new one). This patch fix this behaviour: * A new SingleLastOperation, UpdateFTIndexOp, to reindex entity whose ftindexation changed during a commit. This data is read from session.transaction_data['fti_update_etypes'] * The SourceDbRDefUpdate operation to store Etype who modify they fulltextindexed of attribute in session.transaction_data['fti_update_etypes']. * A new test is added to check the behaviour

3.6 api update (introduced by merge)

when validating a form, we should properly call 'actual_fields(form) on edited field else compound field are not correctly processed

#714109: [selectors] non_final_entity should implement score_class

merge

add XXX note

[form] cache field value in form.formvalues using (field, form) key since in some case the same field instance may be shared accross multiple forms, which may share the formvalues dict in case of sub-forms