DCA Spill includes useless channels

I love the DCA spill feature because it's exactly how I find my channels.

Unfortunately, in some cases useless channels are also displayed, which is a shame, especially on the X32-Compact, where there are only 8 faders available for the input channels.

- If a channel is deactivated (Config->Source=Off), it is still displayed.

- if channels are linked (Config->LINK), both are displayed, although one would be sufficient.

In contrast, Matrix and Mono/LR are never displayed, although they are assigned to the DCA. Especially because I often use the DCA spill to check which channels are assigned to a DCA, this is bad, because who doesn't know that you are wondering why there is no signal and in the end it was a DCA that was pulled down.

Found on: X32 Compact (Firmware 4.13)