Fix #650: Resetting configuration raises error when file do not exist
Fix #627 Clear text fields when removing a talk or removing all talks
Fix #664 Feedback when desktop record region selected
Fix #647 Skip tests related to RTMP plugin for Windows

Partly fix #647.
The RTMP plugin is not included in GStreamer for Win32, so the test based on it can cause problems.
This fix will skip these tests.