code: public JComponent createButtonStack(final Size minimumButtonSize) {
  		return createButtonStack(minimumButtonSize, GuiStandardUtils.createLeftAndRightBorder(UIConstants.TWO_SPACES));
  	}
docs: Create a button stack with buttons for all the commands. Adds a border
  left and right of 2 spaces.
  
  @param minimumButtonSize Minimum size of the buttons (can be null)
  @return never null