Fix compile errors

qgroundcontrol.pro

@@ -108,7 +108,8 @@ QT += network \
     sql \
     printsupport \
     webkitwidgets \
-    quick
+    quick \
+    quickwidgets
 
 #  testlib is needed even in release flavor for QSignalSpy support
 QT += testlib

src/qgcunittest/MockMavlinkFileServer.cc

@@ -97,7 +97,6 @@ void MockMavlinkFileServer::_openCommand(QGCUASFileManager::Request* request)
     
     size_t cchPath = strnlen((char *)request->data, sizeof(request->data));
     Q_ASSERT(cchPath != sizeof(request->data));
-    Q_UNUSED(connected); // Fix initialized-but-not-referenced warning on release builds
     path = (char *)request->data;
     
     // Check path against one of our known test cases