correct btnSort in CertifList

components/certif/List.vue

@@ -8,14 +8,14 @@
 			:placeholder="$t('recherche.title')" />
 		<table class="table table-striped table-hover">
 			<thead class="thead-light">
-				<th class="position-relative" @click="sort('uid')">
+				<th class="p-0" @click="sort('uid')">
 					<BtnSort
 						:title="$t('membres')"
 						fieldName="uid"
 						:currentSort="currentSort"
 						:currentSortDir="currentSortDir" />
 				</th>
-				<th class="position-relative" @click="sort('expires_on')">
+				<th class="p-0" @click="sort('expires_on')">
 					<BtnSort
 						class="justify-content-end"
 						:title="$t('expire')"