+++ This bug was initially created as a clone of Bug #1089274 +++

## Observation

openQA test in scenario opensuse-15.0-DVD-Updates-x86_64-gnome@uefi in
[partitioning](https://openqa.opensuse.org/tests/676686/modules/partitioning/steps/1)
rpoposes a separate home partition on a 20 GB hard disk leaving only 10.82 GB
for the / part which is then quickly filled up making the openQA test fail in a
later step:
https://openqa.opensuse.org/tests/676686#step/gnucash/47


## Reproducible

Every time on 20 GB disk based on default proposal.


## Expected result

Last good: [openSUSE Leap
42.3](https://openqa.opensuse.org/tests/676655#step/partitioning/1) in the same
scenario, with same disk size proposed no separate home partition so leaving
around 18 GB for /

The default disk proposal should not be that small caused by the separate home.
I suspect proposing a separate home only above a higher level of available
space would be better.


## Further details

Always latest result in this scenario:
[latest](https://openqa.opensuse.org/tests/latest?arch=x86_64&flavor=DVD-Updates&test=gnome&machine=uefi&distri=opensuse&version=15.0)

Bug ID	1093372
Summary	[storage] Default partition proposal includes separate home on 20GB leaving only 10.8 GB which are quickly filled up on a default installation
Classification	openSUSE
Product	openSUSE Distribution
Version	Leap 15.0
Hardware	Other
OS	Other
Status	NEW
Severity	Major
Priority	P5 - None
Component	Installation
Assignee	yast2-maintainers@suse.de
Reporter	okurz@suse.com
QA Contact	jsrain@suse.com
CC	afaerber@suse.com, alarrosa@suse.com, ancor@suse.com, anton.smorodskyi@suse.com, behlert@suse.com, dleuenberger@suse.com, eich@suse.com, fcrozat@suse.com, fs@suse.com, ihno@suse.com, jayk@suse.com, jreidinger@suse.com, jsrain@suse.com, kdupke@suse.com, kukuk@suse.com, lnussel@suse.com, lpechacek@suse.com, mge@suse.com, mgriessmeier@suse.com, mlin@suse.com, okurz@suse.com
Depends on	1089274
Found By	---
Blocker	Yes
Flags	needinfo?(lnussel@suse.com)