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/PathVariableDialog.java
* This dialog type: <code>NEW_VARIABLE</code> or
     * <code>EXISTING_VARIABLE</code>.
     */
    private int type;
    /**
     * The type of variable that can be edited in this dialog.
     * <code>IResource.FILE</code> or <code>IResource.FOLDER</code>
     */
    private int variableType;
    /**
     * The name of the variable being edited.
     */
    private String variableName;
    /**
     * The value of the variable being edited.
     */
    private String variableValue;
    /**
     * The original name of the variable being edited. It is used when testing
     * if the current variable's name is already in use.
     */
    private String originalName;
    /**
     * Used to select the proper message depending on the current mode
     * (new/existing variable).
     */
    private int operationMode = 0;
    /**
     * Reference to the path variable manager. It is used for validating
     * variable names.