Made Xresources/tmux about as good as could get at present but tmux still kills most XTerm/Xresources overrides

- e.g. kills lines Alt+Left/Alt+Right & Super+Left/Super+Right which were bound to specific escape sequences in .XResources and then bound again in Z-Shell

The line in tmux.config fixes some of the xterm stuff (Alt+Left/Alt+Right) but not (Super+Left/Super+Right).
This will either need me to compile my own termifo entry or to change escape sequences to something in the terminfo I think?