Wave 13

[laerreal]

Patches from devel mostly targeting Qemu log viewer.

v2

• coding style
• typos
• Py2 and Python 3.5.0-3.5.2 compatibility fixes
• revert "HotKey: inherit from CurrentKeyboard helper" patch
• add "textview: use TextViewerWindow from widgets" patch from devel
• add "misc/textview.py: update TextViewerWindow (-> TextViewerTk) import" patch from devel