Ctr+F based search does not work

[LeifAndersen]

In previous versions of this tool, when I use DrRacket's built in search mechanism (Ctr+F, or Command+F on OS X) the cursor would move to whatever I searched for.

However, now, the cursor does not move when searching like that.

[takikawa]

This is because the augmented after-set-position doesn't control the cursor position that's drawn anymore. I think this is fixable, but either (A) after-set-position should also update the vim cursor, but I'm not sure that's always right, or (B) after-set-position should only update the cursor if it was called due to a set-position in another part of DrRacket.