[PATCH 0/2] MR5850: Add IME support to conhost.

[eric pouech (＠epo)]

This MR lets conhost support IME input window mode.

Note: this MR doesn't include support for properly displaying
the glyphs when they fall out of charset of current code page.

It also lets some diacritics to work.
Note: for these, the generated INPUT_RECORD sequence still widely
differs from native:
- it matches the key down INPUT_RECORD + unicode char (which is what
  most app will use)
- it differs on the rest (no key-up, no dead char...) but that shouldn't
  matter too much