Monaco's word definition splits on '.', so accepting a full tag path while a
partial path was typed (e.g. "X.Protected") duplicated the prefix
(-> "X.X.ProtectedValue"). Tag-path items now replace the whole literal
content from the opening quote to the caret.
The suggest/hover popups were offset far from the caret because the theme's
.rise entrance animation leaves a CSS transform on an ancestor, which becomes
the containing block for the position:fixed overflow widgets. Render them in a
body-level overflowWidgetsDomNode so they stay viewport-correct at the caret.