fix a lot bug. Now you can jump or and the dir

Fix:
1. language change fails without cookies
2. modal can't auto-focus
3. something that should be hidden will show after app.removeLoading
4. no-file display error
5. the page will die when loading file list fails
Add:
1. click <a> label which has a path as its href, will jump to the path;
2. FilesList.go() accept paths with all formats and from all sources
Wait:
1. visit file content.
2. manage share
3. a bug at server found today