Add option to center env name (#683)

res/config.ini

@@ -188,6 +188,9 @@ sleep_cmd = null
 # Specifies the key used for sleep (F1-F12)
 sleep_key = F3
 
+# Center the session name.
+text_in_center = false
+
 # TTY in use
 tty = $DEFAULT_TTY