Case sensitive filter does not work for child rows

[LukeCz]

Hi,

When filtering with case sensitive the filter does not find upper case.

Live example: https://jsfiddle.net/cujh01qm/1/
Searching for AAA should keep the last row visible. Instead no rows are visible.

Pasting it here as well:

h
a
aaa
A
AAA

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$(function() {
$("#IndexTable").tablesorter( {
widgets : [ "filter", 'mark' ],
widgetOptions: {
filter_childRows : true,
filter_ignoreCase : false,
mark_caseSensitive: true,
}
});
});