Improve AutoComplete in MQuery Custom Column editor

Currently if you're in the custom column editor and are trying to use autocomplete you inadvertently wind up with whatever you had already typed prepended to your desired autocomplete result.



For example if I'm wanting to use "DateTime.LocalNow()" and it type "DateTime.L" to get the various functions in this group.  If I use the arrow button to select "LocalNow" and hit tab, what is entered into the column editor is "DateTImeDateTime.LocalNow"



It should only give me DateTime.LocalNow and it would be helpful if it auto-completed with the parenthesis the function requires as well.



Thanks