Bug 213139 [Markers] Forms in problems filtering configuration dialog doesn't grab vertical space
type list in marker filtering configuration dialog doesn't grab vertical space
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/FiltersConfigurationDialog.java
filtersList.setSelection(new StructuredSelection(filterGroups
				.iterator().next()));
	}
	/**
	 * Make a working copy of the groups.
	 * 
	 * @param groups
	 * @return Collection of MarkerFieldFilterGroup
	 */
	private Collection makeWorkingCopy(Collection groups) {
		Iterator initialFiltersIterator = groups.iterator();
		Collection returnFilters = new ArrayList(groups.size());
		while (initialFiltersIterator.hasNext()) {
			MarkerFieldFilterGroup group = (MarkerFieldFilterGroup) initialFiltersIterator
					.next();
			MarkerFieldFilterGroup copy = group.makeWorkingCopy();
			if (copy != null)
				returnFilters.add(copy);
		}
		return returnFilters;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#okPressed()
	 */
	protected void okPressed() {
		if (!shouldContinue())
			return;