First Time Wizard Crashes on Mac

[Phill]

It looks like the recent removal of presentations on mac causes the first run wizard to crash.

http://support.openlp.org/issues/1276

OpenLP Bug Report
Version: {u'full': u'1.9.12-bzr2092', u'version': u'1.9.12', u'build':
u'bzr2092'}

--- Details of the Exception. ---

I was re-running the initial wizard and openlp crashed right after the
default theme selection screen

--- Exception Traceback ---
Traceback (most recent call last):
  File
"/Users/jenkins/Documents/workspace/OpenLP_mac_build/build/pyi.darwin/OpenLP/out00-PYZ.pyz/openlp.core.ui.firsttimeform",
line 238, in onCurrentIdChanged
  File
"/Users/jenkins/Documents/workspace/OpenLP_mac_build/build/pyi.darwin/OpenLP/out00-PYZ.pyz/openlp.core.ui.firsttimeform",
line 433, in _performWizard
AttributeError: 'FirstTimeForm' object has no attribute
'presentationCheckBox'
--- System information ---
Platform: Darwin-11.4.2-x86_64-i386-32bit

--- Library Versions ---
Python: 2.7.3
Qt4: 4.8.3
Phonon: 4.4.0
PyQt4: 4.9.4
QtWebkit: 534.34
SQLAlchemy: 0.7.9
SQLAlchemy Migrate: 0.7.2
BeautifulSoup: 3.2.1
lxml: 2.3.2
Chardet: 2.0.1
PyEnchant: 1.6.5
PySQLite: -
Mako: 0.7.2
pyUNO bridge: -