gr-air-modes is partially broken in Stretch. modes_rx works but modes_gui does not work. This is because the WebKit module has been removed from the package python-qt4 (see changelog for python-qt4 (4.11.4+dfsg-2)). Further information is on the Debian wiki Qt4WebKitRemoval page at https://wiki.debian.org/Qt4WebKitRemoval . The upstream bug report is at https://github.com/bistromath/gr-air-modes/issues/98 .
