security: limiter l’usage de `#ENV**` dans les erreurs de formulaires

& refactor: homogeneiser l'utilisation de #ENV dans les formulaires

Ref: spip-team/securite#4841

formulaires/configurer_compteur.html

@@ -6,23 +6,23 @@
 	<form action="#ENV{action}#formulaire_configurer_compteur" method="post"><div>
 		#ACTION_FORMULAIRE
 		<div class="editer-groupe">
-			<div class='editer configurer_activer_statistiques[ (#ENV**{erreurs}|table_valeur{activer_statistiques}|oui)erreur]'>
-				[<span class='erreur_message'>(#ENV**{erreurs}|table_valeur{activer_statistiques})</span>]
+			<div class='editer configurer_activer_statistiques[ (#ENV*{erreurs/activer_statistiques}|oui)erreur]'>
+				[<span class='erreur_message'>(#ENV*{erreurs/activer_statistiques})</span>]
 				<div class='choix'>
 					<input class='checkbox' type="checkbox" name="activer_statistiques" value='oui' [checked="(#ENV{activer_statistiques}|=={oui}|?{checked})"] id="activer_statistiques"/>
 					<label for="activer_statistiques"><:statistiques:item_gerer_statistiques:></label>
 				</div>
 			</div>
-			<div class='editer configurer_activer_referers[ (#ENV**{erreurs}|table_valeur{activer_referers}|oui)erreur]'>
-				[<span class='erreur_message'>(#ENV**{erreurs}|table_valeur{activer_referers})</span>]
+			<div class='editer configurer_activer_referers[ (#ENV*{erreurs/activer_referers}|oui)erreur]'>
+				[<span class='erreur_message'>(#ENV*{erreurs/activer_referers})</span>]
 				<div class='choix'>
 					<input class='checkbox' type="checkbox" name="activer_referers" value='oui' [checked="(#ENV{activer_referers, oui}|=={oui}|?{checked})"] id="activer_referers"/>
 					<label for="activer_referers"><:statistiques:info_referer_oui:></label>
 				</div>
 			</div>
-			<div class='editer configurer_activer_captures_referers[ (#ENV**{erreurs}|table_valeur{activer_captures_referers}|oui)erreur]'>
+			<div class='editer configurer_activer_captures_referers[ (#ENV*{erreurs/activer_captures_referers}|oui)erreur]'>
 				<div class='explication'><:statistiques:info_question_vignettes_referer{url=https://plugins.spip.net/thumbsites.html}:></div>
-				[<span class='erreur_message'>(#ENV**{erreurs}|table_valeur{activer_captures_referers})</span>]
+				[<span class='erreur_message'>(#ENV*{erreurs/activer_captures_referers})</span>]
 				<div class='choix'>
 					<input class='checkbox' type="checkbox" name="activer_captures_referers" value='oui' [checked="(#ENV{activer_captures_referers}|=={oui}|et{#PLUGIN{thumbsites}}|?{checked})"][(#PLUGIN{thumbsites}|non) disabled=disabled"] id="activer_captures_referers"/>
 					<label for="activer_captures_referers"><:statistiques:info_question_vignettes_referer_oui:></label>