set defaults in header file, add comments

src/app/browser/main.cpp

@@ -11,7 +11,7 @@ Main::Main()
     );
 
     set_homogeneous(
-        true
+        HOMOGENEOUS
     );
 
     // Init tabs

src/app/browser/main.hpp

@@ -14,15 +14,21 @@ namespace app::browser
 
     class Main : public Gtk::Box
     {
+        // Components
         main::Tab * mainTab;
 
+        // Defaults
+        const bool HOMOGENEOUS = true;
+
         public:
 
             Main();
             ~Main();
 
+            // Getters
             Glib::ustring get_current_tab_label_text();
 
+            // Actions
             void tab_append();
             void tab_close_all();
             void tab_close_left();