Designer UI Adjustment

When I resize the panels within Designer, the header for the Basic OPC/Group Items doesn’t remain at a fixed size …

… could this be set to a fixed size?

In addition to the above, I wouldn’t mind seeing the ability to sort by the various columns as well as add/remove columns. I’d also like to see the ability to organize the list by dragging and dropping items …

… all small items I could live without but would be nice UI improvements.