Updated Russian locale for Release 0.41

Little grammar mistakes were edited. Some text was paraphrased. Some missing fields were added.
Since you're already doing this, could you please change this entry from `FILE_ALREADY_EXISTS` to `ENTRY_WITH_THE_SAME_NAME_EXISTS` and change the translation as well. Original entry is:
```
    "ENTRY_WITH_SAME_NAME_EXISTS"       : "A file or directory with the name <span class='dialog-filename'>{0}</span> already exists.",
```