W serial line support for XDR-GTK 

Hello, in newer versions of XDR-GTK the line starting with "W" is supported to set the bandwidth. You can set a custom BW this way as well. Is it possible to add support for this? 
Basically, an example line is: 
W133000 = 133 KHz of BW

We have people using the FM-DX Webserver on SDRs with your plugin and the support is sadly missing. Would it be possible to add this? Thanks!