Suppress sync menu entry if no credentials are defined

src/activities/reader/EpubReaderMenuActivity.cpp

@@ -3,6 +3,7 @@
 #include <GfxRenderer.h>
 #include <I18n.h>
 
+#include "KOReaderCredentialStore.h"
 #include "MappedInputManager.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
@@ -32,7 +33,9 @@ std::vector<EpubReaderMenuActivity::MenuItem> EpubReaderMenuActivity::buildMenuI
   items.push_back({MenuAction::SCREENSHOT, StrId::STR_SCREENSHOT_BUTTON});
   items.push_back({MenuAction::DISPLAY_QR, StrId::STR_DISPLAY_QR});
   items.push_back({MenuAction::GO_HOME, StrId::STR_GO_HOME_BUTTON});
-  items.push_back({MenuAction::SYNC, StrId::STR_SYNC_PROGRESS});
+  if (KOREADER_STORE.hasCredentials()) {
+    items.push_back({MenuAction::SYNC, StrId::STR_SYNC_PROGRESS});
+  }
   items.push_back({MenuAction::DELETE_CACHE, StrId::STR_DELETE_CACHE});
   return items;
 }