modules/admin-full: Display wifi devices as enabled if user removes the disabled-option

modules/admin-full/luasrc/model/cbi/admin_wifi/devices.lua

@@ -21,6 +21,10 @@ en = s:option(Flag, "disabled", translate("enable"))
 en.enabled = "0"
 en.disabled = "1"
 
+function en.cfgvalue(self, section)
+	return Flag.cfgvalue(self, section) or "0"
+end
+
 t = s:option(ListValue, "type", translate("type"))
 t:value("broadcom")
 t:value("atheros")