Titles of activities with double quotes cause "unescaped" errors

[Adam Jenkins]

When adding an activity while using Tiles, if the activity name contains double quotes (“) it can cause some weirdness.

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Simple test:

1. Log in to a course using Tiles
2. Create an activity called (including quotes): “Hidden due to bug”
3. Save and return to course.

This results in a bit of weirdness in the HTML. The quotes are not properly escaped and so strange attributes are added to the <li> of the activity. In the test example above, the attribute hidden=”” is created and the CSS style

[hidden] {display: none !important;}

is activated, hiding the activity from view (even though the activity itself is set to “show”).

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[David Watson]

Fixes issue #70 escape chars in mod title

→ <<cset df2cb0417b8e>>