You have to change the "Switch to Next Layer" and "Switch to Previous Layer" to a different key (I used Alt++ and Alt+-") then change "Zoom In" and "Zoom Out". Duplicate key definitions will ensure that one of the duplicate keys will not work correct.
I already tested this using 5.1.0-rc2-38-g4612175da) on windows and it works fine once you configure the hot keys correctly.
You have to change the "Switch to Next Layer" and "Switch to Previous Layer" to a different key (I used Alt++ and Alt+-") then change "Zoom In" and "Zoom Out". Duplicate key definitions will ensure that one of the duplicate keys will not work correct.
I already tested this using 5.1.0-rc2- 38-g4612175da) on windows and it works fine once you configure the hot keys correctly.