Added menu item to toggle Tabs visibility.

src/files.h

@@ -155,6 +155,7 @@ R"RAW(
 R"RAW(
         "close_tab": "<primary>w",
         "window_toggle_split": "",
+        "window_toggle_tabs": "",
         "window_clear_terminal": ""
     },
     "project": {

src/menu.cc

@@ -443,6 +443,10 @@ const Glib::ustring menu_xml= R"RAW(<interface>
           <attribute name='label' translatable='yes'>_Toggle _Split</attribute>
           <attribute name='action'>app.window_toggle_split</attribute>
         </item>
+        <item>
+          <attribute name='label' translatable='yes'>_Toggle _Tabs _Visibility</attribute>
+          <attribute name='action'>app.window_toggle_tabs</attribute>
+        </item>
       </section>
       <section>
         <item>

src/notebook.cc

@@ -604,6 +604,12 @@ void Notebook::toggle_split() {
   }
   split=!split;
 }
+void Notebook::toggle_tabs() {
+  Notebook::tabs_visible =! Notebook::tabs_visible;		
+  //Show / Hide tabs for each notbook.		
+  for(auto& notebook : Notebook::notebooks)
+    notebook.set_show_tabs(Notebook::tabs_visible);		
+}
 
 boost::filesystem::path Notebook::get_current_folder() {
   if(!Directories::get().path.empty())

src/notebook.h

@@ -46,6 +46,8 @@ public:
   void next();
   void previous();
   void toggle_split();
+  /// Hide/Show tabs.		
+  void toggle_tabs();
   boost::filesystem::path get_current_folder();
 
   Gtk::Label status_location;
@@ -79,6 +81,7 @@ private:
   std::vector<std::unique_ptr<TabLabel> > tab_labels;
   
   bool split=false;
+  bool tabs_visible = true; //Flag set to true when the tabs are visible.
   size_t last_index=-1;
   
   void set_current_view(Source::View *view);

src/window.cc

@@ -1183,6 +1183,9 @@ void Window::set_menu_actions() {
   menu.add_action("window_clear_terminal", [this] {
     Terminal::get().clear();
   });
+  menu.add_action("window_toggle_tabs", [this] {
+    Notebook::get().toggle_tabs();
+  });
 }
 
 void Window::activate_menu_items() {