Bug 292901 Confusing "Target" group for children filters
Steps: 1) I added a compound filter "or" and set "Mode" to "Exclude" and "Target" to "Folders" 2) I tried to add "Regex Filter" as a child for the compound one, and I see that I can choose "Target" here too Maybe we should choose "Target" only for top-level filters as we do with "Mode"? Or "Mode" should be available to set only if not already chosen for the parent?
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceFilterGroup.java
event.data = getFilterCopySelection();
			}
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see
		 * org.eclipse.swt.dnd.DragSourceListener#dragStart(org.eclipse.swt.
		 * dnd.DragSourceEvent)
		 */
		public void dragStart(DragSourceEvent event) {
			if (getFilterCopySelection().length == 0)
				event.doit = false;
		}
	}
	private static int getMinimumColumnWidth(TreeColumn column, int hint) {
		Assert.isNotNull(column);
		FontMetrics fontMetrics;
		GC gc = new GC(column.getParent());
		try {
			gc.setFont(column.getParent().getFont());
			fontMetrics = gc.getFontMetrics();
		} finally {
			gc.dispose();
		}
		return Math.max(hint, fontMetrics.getAverageCharWidth()
				* column.getText().length());
	}
	private void createButtonGroup(Composite parent) {
		Composite composite = new Composite(parent, SWT.NONE);