Minor fixes

Fixes: https://launchpad.net/bugs/1735765

openlp/core/api/deploy.py

@@ -52,6 +52,8 @@ def download_sha256():
         web_config = get_web_page('https://get.openlp.org/webclient/download.cfg', headers={'User-Agent': user_agent})
     except ConnectionError:
         return False
+    if not web_config:
+        return None
     file_bits = web_config.split()
     return file_bits[0], file_bits[2]
 

openlp/core/api/http/server.py

@@ -67,7 +67,10 @@ class HttpWorker(QtCore.QObject):
         address = Settings().value('api/ip address')
         port = Settings().value('api/port')
         Registry().execute('get_website_version')
-        serve(application, host=address, port=port)
+        try:
+            serve(application, host=address, port=port)
+        except OSError:
+            log.exception('An error occurred when serving the application.')
 
     def stop(self):
         pass

openlp/core/app.py

@@ -403,8 +403,8 @@ def main(args=None):
                      .format(back_up_path=back_up_path))
             QtWidgets.QMessageBox.information(
                 None, translate('OpenLP', 'Settings Upgrade'),
-                translate('OpenLP', 'Your settings are about to upgraded. A backup will be created at {back_up_path}')
-                     .format(back_up_path=back_up_path))
+                translate('OpenLP', 'Your settings are about to be upgraded. A backup will be created at '
+                                    '{back_up_path}').format(back_up_path=back_up_path))
             settings.export(back_up_path)
         settings.upgrade_settings()
     # First time checks in settings

openlp/core/common/settings.py

@@ -236,7 +236,7 @@ class Settings(QtCore.QSettings):
         ('bibles/last search type', '', []),
         ('custom/last search type', 'custom/last used search type', []),
         # The following changes are being made for the conversion to using Path objects made in 2.6 development
-        ('advanced/data path', 'advanced/data path', [(str_to_path, None)]),
+        ('advanced/data path', 'advanced/data path', [(lambda p: Path(p) if p is not None else None, None)]),
         ('crashreport/last directory', 'crashreport/last directory', [(str_to_path, None)]),
         ('servicemanager/last directory', 'servicemanager/last directory', [(str_to_path, None)]),
         ('servicemanager/last file', 'servicemanager/last file', [(str_to_path, None)]),

openlp/core/ui/servicemanager.py

@@ -389,7 +389,8 @@ class ServiceManager(QtWidgets.QWidget, RegistryBase, Ui_ServiceManager, LogMixi
         """
         Return the current file name, excluding the path.
         """
-        return self._service_path.name
+        if self._service_path:
+            return self._service_path.name
 
     def reset_supported_suffixes(self):
         """