Fix paths

- Use QStandardPaths
- Load settings in StatusView widget
- Update about
- Remove redundant code
- Temporary hide missing audiopanorama error as workaround for windows build

3rdparty/qtsingleapplication/qtlocalpeer.cpp

@@ -108,7 +108,6 @@ bool QtLocalPeer::isClient()
     if (lockFile.isLocked())
         return false;
 
-    //if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
     if (!lockFile.lock(QtLockedFile::WriteLock, false))
         return true;