Hey, found this app called Y PPA manager which basically provides graphical add ppa's, remove or purge or manage packages (Advanced users) I think this is a really good app for mate.
Here is the link to download site: https://launchpad.net/y-ppa-manager
Screenshot:[
I think this would be great to have for mate
Maybe, if the idea is to encourage the use of PPAs.
I get confused by all the trust issues involved.
Not something I’ll be including default, something for the tweakers 
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My brother is the tweaker Im actually more practical, but your call wimpy think this program brings graphical way to remove PPA’s but I accept a no.
Check this too please:
https://ubuntu-mate.community/t/systemback-for-welcome/12174
