Add option to run command after inactivity delay (closes #747)

Signed-off-by: AnErrupTion <anerruption@disroot.org>

res/config.ini

@@ -231,6 +231,13 @@ hide_keyboard_locks = false
 # Remove version number from the top left corner
 hide_version_string = false
 
+# Command executed when no input is detected for a certain time
+# If null, no command will be executed
+inactivity_cmd = null
+
+# Executes a command after a certain amount of seconds
+inactivity_delay = 0
+
 # Initial text to show on the info line
 # If set to null, the info line defaults to the hostname
 initial_info_text = null