GoldenDict can't handle certain dictionary filenames

[Tvangeste]

At least on Windows. Let's say, I have a Russian locale. And any dictionary's file name with umlauts is completely ignored by GD.

For example, testüö.dsl, or test朗.dsl. Looks like GD stores all the dictionary file names in standard strings, first converting to them via toLocal8Bit(), which can't handle those symbols that are outside of the current locale.

There are some comment notes in dictionary.cc about desire to be Qt-neutral and not using any Qt stuff, but the code still has some Qt dependencies already. Maybe, the names should be stored as QStrings then?

[Tvangeste]

Or, maybe we should just always use toUtf8() and fromUtf8() to convert filenames to byte arrays and back on Windows? That seem to be a better option: no need to tie with qt, no need to rewrite stuff... :)

[Abs62]

Fixed in commit 2763b74.