Windows: use Unicode input directly

[penguinolog]

Fix: #934 #882

Checklist

• I've ensured that similar functionality has not already been implemented
• I've ensured that similar functionality has not earlier been proposed and declined
• I've branched off the master branch
• I've merged fresh upstream into my branch recently
• I've ran tox successfully in local environment
• I've included docstrings and/or documentation and/or examples for my code (if this is a new feature)

[coveralls]

Pull Request Test Coverage Report for Build 11349367813

Details

• 0 of 4 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.004%) to 74.589%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
urwid/display/_win32_raw_display.py	0	4	0.0%

Totals
Change from base Build 11343022563:	-0.004%
Covered Lines:	9419
Relevant Lines:	12754

---

💛 - Coveralls