HTG Random source: mask everything when fraction is 1
We now ensure that every tree is masked when masking fraction is 1.
Not tested here, but in ParaView, I'll simply add to the Random source test:
<!-- Set fraction to 1-->
<pqevent object="pqClientMainWindow/propertiesDock/propertiesPanel/scrollArea/qt_scrollarea_viewport/scrollAreaWidgetContents/PropertiesFrame/ProxyPanel/MaskedFraction/DoubleRangeWidget/DoubleLineEdit" command="set_string" arguments="1" />
<pqevent object="pqClientMainWindow/propertiesDock/propertiesPanel/Accept" command="activate" arguments="" />
<pqcompareview object="pqClientMainWindow/centralwidget/MultiViewWidget/CoreWidget/qt_tabwidget_stackedwidget/MultiViewWidget1/Container/Frame.0/CentralWidgetFrame/Viewport" baseline="$PARAVIEW_DATA_ROOT/Clients/ParaView/Testing/Data/Baseline/RandomHyperTreeGridSourceNull.png" width="300" height="300" />