Footprint Editor Wizard preview not reacting to checkbox changes

[Alessandro Gatti]

Reproduction steps:

1. Create new project or open an empty project
2. Open the Footprint Editor
3. Click on 'New footprint using footprint wizard'
4. Click on 'Select wizard script to run'
5. Pick QFN
6. Click on the 'Oval' checkbox twice so it should be unchecked (it should be just once, but for some reason the first click only selects the cell instead of selecting *and* changing the state). The preview still shows oval pads.

System version information:

ProductName: Mac OS X
ProductVersion: 10.13.3
BuildVersion: 17D102

KiCad version information:

Packaged on 20180309-033023
KiCad revision: r9c62792
KiCad CMake Settings: -DDEFAULT_INSTALL_PATH=/Library/Application Support/kicad
-DCMAKE_C_COMPILER=/usr/bin/clang
-DCMAKE_CXX_COMPILER=/usr/bin/clang++
-DCMAKE_OSX_SYSROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk
-DCMAKE_OSX_DEPLOYMENT_TARGET=10.9
-DwxWidgets_CONFIG_EXECUTABLE=../wx/wx-bin/bin/wx-config
-DKICAD_SCRIPTING=ON
-DKICAD_SCRIPTING_MODULES=ON
-DKICAD_SCRIPTING_WXPYTHON=ON
-DKICAD_SCRIPTING_ACTION_MENU=ON
-DPYTHON_EXECUTABLE=/usr/bin/python
-DPYTHON_SITE_PACKAGE_PATH=/Volumes/SSD/workspace/osx-kicad-adam-head/wx/wx-bin/lib/python2.7/site-packages
-DKICAD_USE_OCE=ON
-DOCE_DIR=/Users/kicad/homebrew/opt/oce/OCE.framework/Versions/0.17/Resources/
-DKICAD_SPICE=ON
-DKICAD_REPO_NAME=maser-c4osx
-DCMAKE_INSTALL_PREFIX=../bin
-DCMAKE_BUILD_TYPE=RelWithDebInfo
Build script revision: r9c62792

Thank you for your time,
Alessandro