COMP: Silence widget name already in use in qSlicerSettingsModulesPanel

This commit fixes the following warning:

/path/to/Slicer/Base/QTGUI/Resources/UI/qSlicerSettingsModulesPanel.ui: Warning: The name 'horizontalLayout_4' (QHBoxLayout) is already in use, defaulting to 'horizontalLayout_41'

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23451 3bd1e089-480b-0410-8dfb-8563597acbee