Fix spelling

translation fix

style fix

change dialog style

fix for #582

translation fix

sort items in Menu.xml

o Adds a reinstall backend call
o Moves pkg_upgrade.sh into its own dir
o Don't clobber progress output when action is running
o Rename action to clearly reflect it's purpose
o Tweak EOL message a bit more

This is a test of how far we can go with our backend restructuring
without glitching firmware update temporarily.

FTP proxy via squid proxy server is available if needed.