Merge down layer slow, needs progress bar

[robertochaves 5]

For some features merging down a layer is super slow, and because it is unpredictable what is happening I will sometimes not know if it detected my merge down layer request and I will do a second one.
One is most often able to pan and interact while it is merging in the background (without any sort of info about this happening).

I like that the UI allows you to do this, but I really would want to see some sort of progress bar clearly visible.

Also having merge be faster would be nice.
Mergin a 42 pixel frequency separated layers takes forever...   (I'm running on the latest 10.5" iPad pro)

 

[Nighternet 23]

It needs progress bar for every process. With the ability to abort it.