Add a tooltip for post creation button.

src/main/ts/src/app/posts/myPosts/my-posts.component.html

@@ -7,5 +7,9 @@
   <span *ngIf="listPosts?.length === 0">
     Aucun article.
   </span>
-	<a routerLink="/posts/new" class="fixed-action-btn green white-text">+</a>
+	<a routerLink="/posts/new"
+			class="fixed-action-btn green white-text"
+			mdbTooltip="Créer un article" placement="left">
+		+
+	</a>
 </div>