Extended Tag Fieldes Dialog Suggestions

Hi

Thanks again for your No 1 Tag editor.
In the Extended tag Dialog, there is a button to give the value of < blank > to the fields (to clear them) . why not using similar option to give the value of < keep > t the fields?? u can assign a hot key (for example "Insert") to it. in would be useful when the first button I mentioned is wrongly pressed. without this I have to cancel the dialog & do what I done all over again.

Best regards

PS. It would be useful if fields in extended tag panel worked like fields in normal tag panel. (showing info of selected files in drop down)