Prevent upgrade during backup
Prevent upgrade during backup

Fixes #30

Woersty/LoxBerry-Plugin-miniserverbackup,Woersty/LoxBerry-Plugin-miniserverbackup,Woersty/LoxBerry-Plugin-miniserverbackup,Woersty/LoxBerry-Plugin-miniserverbackup,Woersty/LoxBerry-Plugin-miniserverbackup