Added check to see if README.md is readable

src/panels/readme/readmepanel.cpp

@@ -82,7 +82,12 @@ bool ReadmePanel::urlChanged()
 {
     m_readmeUrl.setUrl((url().toString().append("/README.md")));
     QFileInfo check_file(m_readmeUrl.path());
-    if (!m_readmeUrl.isValid() || !check_file.exists() || !toggleViewAction->isChecked()) {
+
+    if (!m_readmeUrl.isValid()
+        || !check_file.exists()
+        || !check_file.isReadable()
+        || !toggleViewAction->isChecked()) {
+
         hide();
         return true;
     }