On Kubuntu, these denies are being produced:
```
type=AVC msg=audit(1549301888.419:91): apparmor="DENIED" operation="open"
profile="qtox"
name="/usr/share/kubuntu-default-settings/kf5-settings/kdeglobals" pid=1603
comm="qtox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

type=AVC msg=audit(1549301964.008:126): apparmor="DENIED" operation="open"
profile="qtox" name="/usr/share/kubuntu-default-settings/kf5-settings/breezerc"
pid=1822 comm="qtox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

type=AVC msg=audit(1549302031.194:155): apparmor="DENIED" operation="open"
profile="qtox"
name="/usr/share/kubuntu-default-settings/kf5-settings/baloofilerc" pid=1899
comm="qtox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
```

Meanwhile, on openSUSE:
```
type=AVC msg=audit(1549302286.921:205): apparmor="DENIED" operation="open" profile="qtox" name="/etc/xdg/kdeglobals" pid=12781 comm="qtox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
```

Add read only rules for allowing access to global KDE settings.