Use tkinter.filedialog on win32, because we now fix locale encoding

tkinter ends up calling something where utf8 characters won't work
because of the windows encoding, e.g. cp1252.

We can't set encoding just for the dialogs, as it's not thread safe.  So
we'll just set it at startup instead.  Utilising:

	locale.setlocale(locale.LC_ALL, '')

to get things set up initially, so we can properly retrieve the language
to go with the encoding on the subsequent setlocale() call.

EDMarketConnector.py

@@ -1046,6 +1046,15 @@ Locale LC_NUMERIC: {locale.getlocale(locale.LC_NUMERIC)}
 Locale LC_TIME: {locale.getlocale(locale.LC_TIME)}'''
 )
 
+    # Change locale to a utf8 one
+    # First make sure the local is actually set as per locale's idea of defaults
+    locale.setlocale(locale.LC_ALL, '')
+    # Now find out the current locale, mostly the language
+    locale_startup = locale.getlocale(locale.LC_ALL)
+    # Now set that same language, but utf8 encoding (it was probably cp1252
+    # or equivalent for other languages).
+    locale.setlocale(locale.LC_ALL, (locale_startup[0], 'utf8'))
+
     # TODO: unittests in place of these
     # logger.debug('Test from __main__')
     # test_logging()

prefs.py

@@ -498,30 +498,13 @@ class PreferencesDialog(tk.Toplevel):
         self.outdir_entry['state']      = local and 'readonly' or tk.DISABLED
 
     def filebrowse(self, title, pathvar):
-        if platform != 'win32':
-            import tkinter.filedialog
-            d = tkinter.filedialog.askdirectory(parent=self, initialdir=expanduser(pathvar.get()), title=title, mustexist=tk.TRUE)
-        else:
-            def browsecallback(hwnd, uMsg, lParam, lpData):
-                # set initial folder
-                if uMsg==BFFM_INITIALIZED and lpData:
-                    ctypes.windll.user32.SendMessageW(hwnd, BFFM_SETSELECTION, 1, lpData);
-                return 0
-
-            browseInfo = BROWSEINFO()
-            browseInfo.lpszTitle = title
-            browseInfo.ulFlags = BIF_RETURNONLYFSDIRS|BIF_USENEWUI
-            browseInfo.lpfn = BrowseCallbackProc(browsecallback)
-            browseInfo.lParam = pathvar.get().startswith('~') and join(config.home, pathvar.get()[2:]) or pathvar.get()
-            ctypes.windll.ole32.CoInitialize(None)
-            pidl = ctypes.windll.shell32.SHBrowseForFolderW(ctypes.byref(browseInfo))
-            if pidl:
-                path = ctypes.create_unicode_buffer(MAX_PATH)
-                ctypes.windll.shell32.SHGetPathFromIDListW(pidl, path)
-                ctypes.windll.ole32.CoTaskMemFree(pidl)
-                d = path.value
-            else:
-                d = None
+        import tkinter.filedialog
+        d = tkinter.filedialog.askdirectory(
+            parent=self,
+            initialdir=expanduser(pathvar.get()),
+            title=title,
+            mustexist=tk.TRUE
+        )
 
         if d:
             pathvar.set(d)