Add modelNotes icon to the carousel if notes exist

Resolves #488

radio/src/gui/colorlcd/view_main_menu.cpp

@@ -30,6 +30,7 @@
 #include "view_channels.h"
 #include "view_statistics.h"
 #include "select_fab_carousel.h"
+#include "view_text.h"
 
 ViewMainMenu::ViewMainMenu(Window* parent) :
     Window(parent->getFullScreenWindow(), {})
@@ -58,6 +59,14 @@ ViewMainMenu::ViewMainMenu(Window* parent) :
     return 0;
   });
 
+  if (modelHasNotes()) {
+    carousel->addButton(ICON_MODEL, "Model\nNotes", [=]() -> uint8_t {
+      deleteLater();
+      readModelNotes();
+      return 0;
+    });
+  }
+
   carousel->addButton(ICON_MONITOR, "Channel\nMonitor", [=]() -> uint8_t {
     deleteLater();
     new ChannelsViewMenu();