add center to ButtonExpand + misc fix

src/components/globals/ButtonExpand.vue

@@ -3,7 +3,7 @@
     v-on="$listeners"
     v-bind="$attrs"
     variant="depart"
-    class="btn-expand"
+    class="btn-expand on-hover"
     :aria-label="expanded ? 'Réduire' : 'Agrandir'"
   >
     <svg aria-hidden="true" viewBox="0 0 75 70">

src/components/nodes/NodeViewTitle.vue

@@ -13,7 +13,7 @@
       <span><strong>{{ toCommaList(node.authors) }}</strong>,</span>
       <span>
         <span v-if="node.preTitle" v-html="' ' + trim(node.preTitle) + ','" />
-        <em v-html="' ' + trim(node.italTitle) || 'pas de titre ital'" />
+        <em v-html="' ' + trim(node.italTitle || node.title) || 'pas de titre ital'" />
         <span v-if="edition && node.edition">, </span>
       </span>
       <div v-if="edition && node.edition" class="edition">