History Edit Curves works fine!
(You Must enable "Show points" for modify the "Historic" curve, ist that normal? )
History Edit curve don't work for a curve of an object trimmed or a "draw solid"? ist that normal?

For Copy Multiple ? (Button "Make Copy" is maybe not a Copy Multiple or an array Copy of object?
Check boxes Yes for the copy but what about the number of copy?

The Ctrl during a Move works fine:)

Untrim (delete) works fine ;)

I had seen that Space Barre Selection is added for Select/ Deselect :)
Maybe "I" as Inverse Selection will be fine ?
(or better include as third choice in the Space Barre selection? Is that possible? it will be tricky and very useful)

A function "Hide Inverse Selected" will be also a task :)