[regression] Manual partitioner only creates primary partitions

Quantal Desktop 20120904.1

There is no option to select the type of partition - primary or logical - in the manual partitioner. It limits the number of partitions to 4 on a fresh drive and the remaining free space is marked as unusable. This is a regression over Alpha 3

If a logical partition already exists, logical partitions are automatically created when the limit of 4 primary partition is reached.

The specification says [1]:
"On a disk that uses MBR, if you choose “Use for: Windows (bootable)” for a new partition, it should be created as a primary partition. Any other type of new partition should be created as a logical partition"

[1] https://docs.google.com/a/canonical.com/document/d/1bZ4yQIVgGaUGSYu3qiUHnQt3ieBZoqunP_DcleHCr3I/edit?pli=1#heading=h.60495b75f2b9

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.11.29
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic x86_64
ApportVersion: 2.5.1-0ubuntu4
Architecture: amd64
CasperVersion: 1.321
Date: Wed Sep 5 07:08:09 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120904.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)