#23 Tooltip on the Superscript button on the toolbar

[Amit Phalgune]

This bug is related to the toolbar containing the
Numerator/ Denominator buttons, Fraction, square root
button, subscript and super script buttons.

The Audio for the subscript and superscript buttons is
correct, but the tooltip that is displayed, when the
mouse if hovered above the buttons is the same
(namely both the buttons show the tooltip
as "superscript", where one is supposed to
be "subscript" and the other is supposed to
be "superscript".