Install: Limited drive repartitioning

[xloem]

Qubes OS version (e.g., R3.1):

3.2

Affected TemplateVMs (e.g., fedora-23, if applicable):

n/a

---

Expected behavior

If I select "I will configure partitioning" on install, an interface is provided to repartition my disk as I like.

Actual behavior:

Cannot repartition disk. If I select my existing partition and hit '-', the list of partitions disappears entirely and is replaced by an interface which allows configuration of mount points only, without partition adjustment.

Steps to reproduce the behavior:

When installing Qubes, select "I will configure partitioning" and attempt to repartition my existing filled external USB drive.

General notes:

---

Related issues:

[xloem]

I see, the new mount points create new partitions; the interface doesn't allow you to select what drive they go on, and makes you make one after removing a partition.

[xloem]

I see, the new mount points create new partitions; the interface doesn't allow you to select what drive they go on, and makes you make one after removing a partition.