path pref) when the current file has no filename.
Split up widget setup code for dialogs_show_open_file(),
dialogs_show_save_as().
Add initial_dir argument for win32_show_file_dialog().
Add utils_get_default_dir_utf8().
Rename utils_get_current_file_dir() to
utils_get_current_file_dir_utf8().


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@2122 ea778897-0a13-0410-b9d1-a72fbfd435f5