add support for starting a file manager daemon using the WM

.config/i3/config.cgt

@@ -224,6 +224,11 @@ exec conky
 # wired notification daemon
 exec wired
 
+<! if opt.commands.file_manager_daemon then !>
+# start file manager daemon
+exec <% opt.commands.file_manager_daemon %>
+<! end !>
+
 # border toggle
 bindsym $mod+b border toggle
 

cg_opts.lua

@@ -18,6 +18,7 @@ opts.commands = {
     email = "claws-mail",
     calculator = "qalculate-gtk",
     file_manager = "thunar",
+    file_manager_daemon = "thunar --daemon",
 
     -- zenity-compatible dialoger
     zenity = "yad",