“select next” with “replace newest” should unselect the last selection if it’s the last selection in the buffer

[LPGhatguy]

In both VS Code and Sublime Text, using the "select next with replace newest action" (Ctrl-K, Ctrl-D in VS Code and Ctrl-Shift-D) when the most recent selection is the last occurrence of the word in the file, that selection is unselected. In Zed, that does not happen.

For example, in this buffer:

foo
foo

Selecting foo and pressing Ctrl-D will select the second foo. Pressing Ctrl-K, Ctrl-D (["editor::SelectNext", {"replace_newest": true}]) should then unselect the second foo like in VS Code, Sublime Text, etc. Instead, the second foo stays selected.