Enter does not select item in select element in inline edit and blocks double click.
Steps to reproduce:
Open http://trirand.com/blog/jqgrid/jqgrid.html
I suggest to solve the problem like in the change. The idea is very easy. Is one change focus many required finalization actions can be done in the current control. For example in case of <select>
the 'change' event will be fired, onfocusout
will be called and popup menus (context menu or datepicker) will be closed and so on.
SO I suggest to add the line
$(ta).closest("tr.jqgrow").focus();
inside of 'keydown' event handler after the line. The results you can see on the demo.