#164 Rename both start-tag and end-tag simultaneously

[John Cowan]

A very helpful feature would be to change the element name in the end-tag when the element name in the corresponding start-tag is changed, and vice versa. So if you have <foo>....</foo>, and you edit <foo> to <bar>, </foo> would automatically change to </bar> as you type.

Alternatively, this could be done with a "Rename current element" item in the XML menu.