Blender Git Loki

Fix T65532: can't assign a key on Italian apple keyboards.

Apple's international keyboards have an additional `kVK_ISO_Section`
key. With some (Italian, Spanish) keyboard layouts, this is ``, `[` keys
which Blender keymap can use.

Right now this key is explicitly set as `Unknown`.

Note that `kVK_ANSI_Grave` is located in a different location.

Differential Revision: https://developer.blender.org/D12905