Bug in Edit Attributes editor
Don't know where to post bugs. However, the edit attributes pop-up acts strange when you enter a closing brace ')' character. This bevaviour occurs when you edit a paramater of an attribute. Typing in ')' sets the cursor on the 'add new attribute' line. So it is not possible to enter a ')'. This is not handy for a parameter that requires the ')' like typeof(..).
Currently the trick is either to add the ')' by editing the xml or to copy it from the clipboard.

