sidebar: fix unread bold via notify, larger title font, sidebar zoom

data/ui/article_row.blp

@@ -32,6 +32,7 @@ template $ArticleRow : Gtk.Box {
     wrap: true;
     lines: 2;
     ellipsize: end;
+    styles ["article-title"]
   }
 
   Label excerpt_label {

data/ui/article_row.ui

@@ -46,6 +46,9 @@ corresponding .blp file and regenerate this file with blueprint-compiler.
         <property name="wrap">true</property>
         <property name="lines">2</property>
         <property name="ellipsize">3</property>
+        <style>
+          <class name="article-title"/>
+        </style>
       </object>
     </child>
     <child>