Theme Editor: Implemented download and decompression of font pack in the preferences dialog.  Dialog will also allow the user to set a directory for a custom target database, but the update button doesn't work yet.  Also fixed the file filters for open file/open project actions and resized the preferences dialog

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27509 a1c6a512-1295-4272-9138-f99709370657
29 files changed