allow multiple rows selection

src/Entity/Tab/History.php

@@ -186,8 +186,6 @@ class History
             )
         );
 
-
-
         // Init list storage
         $this->list = new \GtkListStore(
             \GObject::TYPE_STRING,
@@ -199,6 +197,10 @@ class History
             $this->list
         );
 
+        $this->treeview->get_selection()->set_mode(
+            \GtkSelectionMode::MULTIPLE
+        );
+
         // Compose body
         $this->body = new \GtkBox(
             \GtkOrientation::VERTICAL