Option to save log files with a click on the button in the admin page

can someone split this message and the message here in a seperate topic ?

I updated the pr to add 2 extra options to download the emonpi update log and backup log. For the emonpi update log i added a button but for backuplog i did not (but did add the route) as i could not find where it is being used.

Please test this on an actual emonpi as i don’t have or use an emonpi i blindly programmed the 2 extra options dealing with emonpi!