test_share_links_search has unix-specific paths

test_filter and test_process_volumes_info fails on windows because the expected value in the code has unix paths, and the code will generate windows paths.

We need to fix the test, and verify that the code is doing the right thing - ie, is it OK to return strings with ~ on windows here?

[FAIL]
Traceback (most recent call last):
  File "C:\Users\mmccrack\Canonical\improve-buildout\scripts\devsetup\parts\ubuntuone-control-panel\ubuntuone\controlpanel\gui\qt\tests\test_share_links_search.py", line 182, in test_filter
    self.assertEqual(expected, self.ui.temp_u1_files)
  File "c:\users\mmccrack\canonical\improve-buildout\scripts\devsetup\eggs\twisted-11.1.0-py2.7-win32.egg\twisted\trial\unittest.py", line 270, in assertEqual
    % (msg, pformat(first), pformat(second)))
twisted.trial.unittest.FailTest: not equal:
a = ['~/blabla/iop']
b = ['~\\blabla\\iop']

===============================================================================
[FAIL]
Traceback (most recent call last):
  File "C:\Users\mmccrack\Canonical\improve-buildout\scripts\devsetup\parts\ubuntuone-control-panel\ubuntuone\controlpanel\gui\qt\tests\test_share_links_search.py", line 167, in test_process_volumes_info
    self.assertEqual(self.ui._thread_explore.u1_files, expected)
  File "c:\users\mmccrack\canonical\improve-buildout\scripts\devsetup\eggs\twisted-11.1.0-py2.7-win32.egg\twisted\trial\unittest.py", line 270, in assertEqual
    % (msg, pformat(first), pformat(second)))
twisted.trial.unittest.FailTest: not equal:
a = ['other_path\\test\\qwe',
 '~\\blabla\\iop',
 '~\\one\\file3',
 '~\\test\\asd',
 '~\\ubuntu\\file1',
 '~\\ubuntu\\file2']
b = ['other_path/test/qwe',
 '~/blabla/iop',
 '~/one/file3',
 '~/test/asd',
 '~/ubuntu/file1',
 '~/ubuntu/file2']