Bug 310446 [LinkedResources] "Preferences > Linked Resources > New..." should not show "Variable..."
I20100425-2000 "Preferences > Linked Resources": The "New..." and "Edit..." dialogs should not show the "Variable..." button. When I select a variable, the "New Variable" dialog show an error (Path must be absolute.), and when I try to click "Extend...", nothing happens.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/PathVariablesGroup.java
{
		public String getToolTipText(Object element) {
            return null;
		}
		public Point getToolTipShift(Object object) {
			return new Point(5, 5);
		}
		public int getToolTipDisplayDelayTime(Object object) {
			return 0;
		}
		public int getToolTipTimeDisplayed(Object object) {
			return 15000;
		}
		public void update(ViewerCell cell) {
			String varName = (String) cell.getElement();
			cell.setText(varName);
			IPath value = (IPath) tempPathVariables.get(varName);
        	URI resolvedURI = pathVariableManager.resolveURI(URIUtil.toURI(value));
        	IPath resolvedValue = URIUtil.toPath(resolvedURI);
            IFileInfo file = IDEResourceInfoUtils.getFileInfo(resolvedValue);
            if (!isBuiltInVariable(varName))
            	cell.setImage(file.exists() ? (file.isDirectory() ? FOLDER_IMG : FILE_IMG) : imageUnkown);
            else
            	cell.setImage(BUILTIN_IMG);
		}
    	
    }
    
    class ValueLabelProvider extends CellLabelProvider