Close the old labels instead of hiding them.
Close the old labels instead of hiding them.

This works around what appears to be a bug in PySide where you can get
a SEGFAULT while creating the new table window.

Tested with PyQt4 and there is no crash.

On OSX crash occurs at:

0 libpyside-python2.6.1.0.dylib  0x000000010074f597
PySide::DynamicQMetaObject::update() const + 9

1 libpyside-python2.6.1.0.dylib  0x0000000100750c7e
PySide::SignalManager::retriveMetaObject(_object*) + 124

2 QtGui.so                       0x00000001032f8bf1
Sbk_QLabel_Init + 1873

KenMacD/tarabish,KenMacD/tarabish,KenMacD/tarabish,KenMacD/tarabish