themes: Make 'About' dialog scalable.
Fix for the file URI on FreeBSD.

On FreeBSD terminology complains about media_add() can not decode
'folder' and '/usr/home/xyz/1.png'.

This could be fixed by changing the URI from "file:%s" to "file://%s"
refactor main.c to win.c
introduce Term_Container
have a working Solo container
splits are back again
make Win a Term_Container
add term_next/prev/first/last
win: rename term->term to term->termio
top-level tabs
toggle tabbar
fix focus issue
wip