implement separated restore action method

src/app/browser/main/tab.cpp

@@ -53,6 +53,21 @@ Tab::Tab(
         [this]
         {
             // Restore session from DB
+            restore();
+        }
+    );
+
+    signal_switch_page().connect(
+        [this](Gtk::Widget*, guint)
+        {
+            // Refresh window elements, e.g. tab label to header bar
+            action__refresh->activate();
+        }
+    );
+}
+
+void Tab::restore()
+{
     sqlite3_stmt* statement;
 
     const int PREPARE = ::sqlite3_prepare_v3(
@@ -95,16 +110,6 @@ Tab::Tab(
     sqlite3_finalize(
         statement
     );
-        }
-    );
-
-    signal_switch_page().connect(
-        [this](Gtk::Widget*, guint)
-        {
-            // Refresh window elements, e.g. tab label to header bar
-            action__refresh->activate();
-        }
-    );
 }
 
 void Tab::save()

src/app/browser/main/tab.hpp

@@ -94,6 +94,8 @@ namespace app::browser::main
                     const int & PAGE_NUMBER
                 );
 
+            void restore();
+
             void save();
 
             void shutdown();