(tmux) Fix integration with nvim

.tmux.conf

@@ -143,12 +143,14 @@ set -g @plugin 'jimeh/tmux-themepack'
 # Bitwarden integration in Tmux
 set -g @plugin 'Alkindi42/tmux-bitwarden'
 
-# Custom made plugin
+# Tmux copy to system clipboard
 set -g @plugin 'tmux-plugins/tmux-yank'
 
-# Custom made plugin
+# Custom powerline theme
 set -g @themepack 'powerline/default/custom'
 
+set -g focus-events on
+
 run -b '~/.tmux/plugins/tpm/tpm' 
 
 ## Plugin specific configuration