Add term cursor overrides to tmux

Allows cursor to be changed by nvim whenever
it mode-changes. Works in urxvt, untested
in other terminals.

.config/tmux/tmux.conf

@@ -68,6 +68,10 @@ set -g @plugin 'Morantron/tmux-fingers'
 
 run -b "${TMUX_PLUGIN_MANAGER_PATH}/tpm/tpm"
 
+# Set Cursor terminal override, so nvim can change cursor style when changing modes
+# more info see nvim, :help tui-cursor-shape
+set -ga terminal-overrides '*:Ss=\E[%p1%d q:Se=\E[ q'
+
 ## Begin theming > theme from github.com/jimeh/tmux-themepack, the powerline/default/blue theme. 
 ## It is integrated with prefix highlight for this tmux conf