Bug 119615 [PropertiesDialog] Can no longer change read-only property
I20051206-1200 1. open the properties for a file 2. change the read-only property 3. close 4. open the properties dialog again ==> state did not change
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/ResourceInfoPage.java
*         path variable.
	 */
	private boolean isPathVariable(IResource resource) {
		if (!resource.isLinked())
			return false;
		IPath resolvedLocation = resource.getLocation();
		if (resolvedLocation == null) {
			
			return true;
		}
		IPath rawLocation = resource.getRawLocation();
		if (resolvedLocation.equals(rawLocation))
			return false;
		return true;
	}
	/**
	 * Reset the editableBox to the false.
	 */
	protected void performDefaults() {
		
		if (this.editableBox != null)
			this.editableBox.setSelection(false);
		
		
		if (this.executableBox != null)
			this.executableBox.setSelection(false);
		
		if (this.derivedBox != null)
			this.derivedBox.setSelection(false);
		encodingEditor.loadDefault();