Bug 155436 [IDE] Project>Clean dialog should not use a question-mark icon
I20060822-1200 The clean dialog displays a question mark icon to explain what clean in this context means. Since this dialog is not a message box and does not ask a question, the icon should be an info icon, or better yet, no icon to not suggest that this could be a message box.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/CleanDialog.java
* Creates a new clean dialog.
     * 
     * @param window the window to create it in
     * @param selection the currently selected projects (may be empty)
     */
    public CleanDialog(IWorkbenchWindow window, IProject[] selection) {
        super(
                window.getShell(),
                IDEWorkbenchMessages.CleanDialog_title, null, getQuestion(), QUESTION, new String[] {
                IDialogConstants.OK_LABEL, IDialogConstants.CANCEL_LABEL }, 0);
        this.window = window;
        this.selection = selection;
        if (this.selection == null) {
			this.selection = new Object[0];
		}
    }
    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.dialogs.Dialog#buttonPressed(int)
     */
    protected void buttonPressed(int buttonId) {
        final boolean cleanAll = allButton.getSelection();
        final boolean buildAll = buildNowButton != null
                && buildNowButton.getSelection();
        super.buttonPressed(buttonId);
        if (buttonId != IDialogConstants.OK_ID) {
			return;
		}