Easy way to move existing keywords to inside another existing keyword without drag and drop. Make it similar to "put new keyword inside this keyword"except you could move existing keywords to inside another by a right click and "Add inside marked keyword".
I thought of a stop gap method in the mean time. I created a new keyword called "*unclassified". With the leading asterisk it remains at the top of the keyword list. By right clicking(Control+Click) *unclassified and selecting "Put new keywords inside this keyword" new keywords added during import will be contained inside *unclassified until I have some time to organize them properly. At least this way they are not scattered alphabetically all throughout my keyword list.