add new widgets to the settings editor
add new keys for the cachedir on different platforms
add support for the new combobox and custom jagexcache directories, also
made clear maincache also clear the beta cache for now.
added support for custom cachedir settings and add backwards
compatibility to the --cachedir=value option
add a prm file (now permanent) for the beta servers
update the changelog and bump the version number to 4.2.2