ui.browseableMessage(): Fix an Unicode problem when NVDA is installed in a path containing a non-ASCII character

[aaclause]

If NVDA is installed in a path containing a non-ASCII character (eg: éè), ui.browseableMessage() fails.

>>> import ui
>>> ui.browseableMessage('test')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "ui.pyo", line 49, in browseableMessage
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 7: ordinal not in range(128)

[LeonarddeR]

Looks great and sensible, only one line of changed code, so I'd suggest merging this directly into master

[derekriemer]

This needs code review and should be relatively easy.

[LeonarddeR]

This is a one liner

[feerrenrut]

Overall this looks good. Could you please describe the testing that has been done. In particular I want to see that the following has been tested:

Test the following with and without non-ASCIIcharacters:

• Standard installation
• Portable installation
• Running from launcher (inside a folder with / without non-ASCII characters)

[aaclause]

Hello,
I've just tested. I generated a build with this change.
Everything works for me! :)

1/ I have moved the launcher archive in a folder with non-ASCII characters (C:\André).
2/ I have run the launcher archive and I launched the Python Console.
I typed this input: import ui; ui.browseableMessage(u'éèçtest').
3/ I created a portable installation (in C:\André\çéèâ).
4/ I started the portable copy and I reiterated with the Python Console and with an add-on.

[feerrenrut]

Great, I'll incubate this change.