Panelization is known from Midnight Commander - it means to capture
command output into a list that can be browsed. Grepping is known from
fzf. Screen saving is a new paradigm
You basically have new screen (a greppable panel) for each new
command, which is saved to the disk (GDBM), and which can be
fetched/navigated to, having also PWD dir and position in panel
restored.