This will blow away the cursor position: User enters: `1245|` Navigates back: `12|45` Enters 'a3': `12453|` Instead of: `12345` There are a

This will blow away the cursor position: User enters: `1245|` Navigates back: `12|45` Enters 'a3': `12453|` Instead of: `12345` There are a ton of "gotchas" in this. Pretty frustrating.