bugfix: Set cert path to root config folder

if cert is nested, the path is set in settings but it would be actually
extracted to root config folder without any nesting. this change aim to
fix that.

eovpn/eovpn_base.py

@@ -324,7 +324,7 @@ def glib_func():
         def dispatch():
             cert = download_remote_to_destination(self.get_setting(self.SETTING.REMOTE), self.EOVPN_OVPN_CONFIG_DIR)
             if len(cert) > 0:
-                ca_path = os.path.join(self.EOVPN_OVPN_CONFIG_DIR, cert[-1])
+                ca_path = os.path.join(self.EOVPN_OVPN_CONFIG_DIR, os.path.basename(cert[-1]))
                 self.set_setting(self.SETTING.CA, ca_path)
 
                 if ca_button is not None: