Before iframing i2ptunnel, clicking the Preview button would open the site in the parent
window. This change will cause the sites to open in the parent window from
within the iframed page.

Directory column could do with a different icon.

The header icons are self-explanatory (but tooltip also has header text); the
status text is available from the tooltip.

This stops app icons getting "stuck" on the right-hand side of /home

   Icon created and contributed by colombo-bt.i2p

     and 'cc04809f72ea9e8f0e0427484d65f613838f65d7'

     and '3b7088110cf55db67e72b7e9bfbf8cd832daac06'

     and 'd02235b886c4e596e3c980dcb0b8df9d3547d103'

I need to investigate a cross-platform method.

            to branch 'i2p.i2p' (head 47f04ff21e8edd00134a0fd68219f86fd3caba36)