wpa_gui-qt4: silence compile warning + wpsTab enable/disable

wpa_gui-qt4: silence compile warning + wpsTab enable/disable

Fix compile warning by renaming gridLayout to wpsGridLayout in
wpagui.ui, it seems to be used internally.

/usr/bin/uic-qt4 eventhistory.ui -o .ui/ui_eventhistory.h
/usr/bin/uic-qt4 scanresults.ui -o .ui/ui_scanresults.h
/usr/bin/uic-qt4 wpagui.ui -o .ui/ui_wpagui.h
Warning: name gridLayout is already used
/usr/bin/uic-qt4 userdatarequest.ui -o .ui/ui_userdatarequest.h
/usr/bin/uic-qt4 networkconfig.ui -o .ui/ui_networkconfig.h

Also disable WPS tab if the running supplicant doesn't support that,
just as the WPS action menu is.

Signed-off-by: Kel Modderman <kel@otaku42.de>