Tabs use the value of the data-target attribute of the active tab link
to find and display the appropriate tab content. In some situations the
elementid value that is used to generate the data-target may contain
certain characters that have a special meaning in the selector context
(e.g. ".", ",", "#") and because of that the target element cannot be
correctly identified. To fix this problem the elementid value needs to
be escaped prior to generating the data-target attribute.
The `contextid` argument of the `tiny_equation_filter` AJAX call is
hardcoded to 1, which causes trouble if the context table does not start
with id 1.
Signed-off-by: Gregor Eichelberger <gregor.eichelberger@tuwien.ac.at>
Mihail Geshoski