fix: correct toolbar position in tables and images when editor is rendered in a modal window

Fixes: https://issues.liferay.com/browse/LPS-128401

Related discussion: https://issues.liferay.com/browse/PTR-2282

Closes: #1466

Author: antonio-ortega

src/selections/selection-position.js

@@ -61,13 +61,16 @@ const centerToolbar = function(toolbar, rect) {
 		}
 	}
 
+	const scrollTop = uiNode ? uiNode.scrollTop : 0;
+
 	const endPosition = [
 		rect.left + rect.width / 2 - halfNodeWidth - scrollPosition.x,
 		rect.top +
 			offsetHeight -
 			toolbarNode.offsetHeight +
 			scrollPosition.y -
-			gutter.top,
+			gutter.top +
+			scrollTop,
 	];
 
 	if (endPosition[0] < 0) {