If calling a tmux session within a tmux session, pressing F12 will
toggle between sending commands to the outer or inner session. If the
outer session is inactive its status-bar will be slightly greyed out to
show that no commands will reach it. If the inner session is a remote
ssh session, it will set some additional stylings for the status-bar to
further differentiate the two.
If no explicit session file is passed in and a new session is being
created tm will look for a .tmux.session file in the pwd and use that to
set up the session.
Moved all personal scripts to ~/.local/bin to be systemd file hierarchy
compliant, as well as XDG compliant. Since they are not configuration
options they don't have anything to do in .config directories.
Also, it's just easier to find than the previous .config/scripts/bin.
