Changed the property used to define a layer name for displays from
"label" (which affects other things in Zephyr and is deprecated) to
"display-name". (It cannot be named simply "name", because that has
special meaning in newer versions of the devicetree compiler.)
"label" is still supported as a fallback, so no changes need to be made
to existing keymaps.
Fixed an error in a previous commit where a member of the selected
endpoint was used without checking if it was the correct transport type.
The nice!view status screen displays the active BLE profile regardless
of whether BLE is active, so we have to get that data directly from the
BLE code instead of from the selected endpoint.
