fs-watcher: While rescanning, remove/add files, instead of just adding

Change-Id: I82c54f97e45d2e13c8532429579a6b329790a9e5
diff --git a/fs-watcher/fs-watcher.cc b/fs-watcher/fs-watcher.cc
index 3f433a1..cfb7f55 100644
--- a/fs-watcher/fs-watcher.cc
+++ b/fs-watcher/fs-watcher.cc
@@ -163,6 +163,7 @@
           QString absFilePath = fileInfo.absoluteFilePath ();
 
           // _LOG_DEBUG ("Attempt to add path to watcher: " << absFilePath.toStdString ());
+          m_watcher->removePath (absFilePath);
           m_watcher->addPath (absFilePath);
 
           if (fileInfo.isFile ())