How to stop being asked "remove channels" at hardware change

#1
I have here several adaptors with mulifunction DVB-C AND DVB-T. But when using DVB-C, it is needed to unselect DVB-T adaptor in hardware settings, and vice versa. So when using cable at home (DVB-C) and terrestrial (DVB-C) somewhere else, I always have to select the used adaptor part and deselect the non used. So far so OK.

But EVERY TIME I deselect one of the adaptors I am asked whether to remove all the channels of the removed adaptor and to scan the activated adaptor. But I neither want to remove the channels and nor want to wait until all is scanned again and nothing new found! So where can I stop each time being asked separately?

Please provide a checkbox in the hardware/devices-window that is normally unselected and can be selected in case the channels can be removed.