Don't consider "Location is already mounted" as an error
Pika should skip over the "Location is already mounted" errors.
pika_backup::ui::utils-DEBUG: 09:59:11.003: Checking path if it is a repo '/run/user/1000/gvfs/smb-share:server=diskstation.local,share=linuxbackup,user=hadess/backup-classic-hadess'
pika_backup::ui::dialog_device_missing-INFO: 09:59:11.018: Trying to mount 'smb://hadess@diskstation.local/linuxbackup/backup-classic-hadess'
pika_backup::ui::utils-WARNING **: 09:59:11.020: Displaying error:
Failed to mount.
Location is already mounted
Pika 0.3.5 from Flathub