Merge remote-tracking branch 'origin/11.0'

Conflicts:
	src/plugins/debugger/debuggeritemmanager.cpp

Change-Id: I9d99d13feff9315f52eacbd84857c63cb69bf804

src/plugins/docker/dockerdevice.cpp

@@ -753,6 +753,8 @@ bool DockerDevicePrivate::startContainer()
                                              "or restart Qt Creator."));
     });
 
+    QTC_ASSERT(m_shell, return false);
+
     if (m_shell->start())
         return true;