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
newValidationStatus = IMessageProvider.ERROR;
            } else {
                allowFinish = true;
            }
        }
        
        
        if (validationStatus == IMessageProvider.NONE
                || newValidationStatus == IMessageProvider.ERROR) {
            validationStatus = newValidationStatus;
            validationMessage = message;
        }
         
        
        if (allowFinish == false) {
			setMessage(validationMessage, validationStatus);
		}
        return allowFinish;
    }
    /**
     * Validates the current variable value, and updates this dialog's message.
     * 
     * @return true if the value is valid, false otherwise
     */
    private boolean validateVariableValue() {
        boolean allowFinish = false;
        
        if (validationStatus == IMessageProvider.ERROR) {
			return false;
		}