[PATCH 0/6] MR2598: imm32: Move IME UI window proc to the default implementation.

[Rémi Bernon (＠rbernon)]

This adds a new `wine/ime.h` header, to share the `IMEPRIVATE` structure between `imm32`, `winex11` and `winemac`. This structure will be internal to `imm32` ultimately, but I intend to keep the header to define a new internal interface for driver to call back into `imm32` (through the UI window), and for a new interface to call from `imm32` into host IME implemented by the drivers.