QtIFW

Do not read the internal ini file through the wrapper class.

If the remote server is running and we are connected, it tries
to read the value on the remote side, though since no resources
are mapped the return value is undefined.
Fixes for example installations into %PROGRAMFILES% on windows.

Change-Id: I6e3c20c9a8bc00270cbdda36142b74570dad14ec
Reviewed-by: Christoph Vogtländer <c.vogtlaender@sigma-surface-science.com>
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>