[show-hint addon] Move call to getScrollInto to avoid a reflow

Author: marijnh

addon/hint/show-hint.js

@@ -230,6 +230,8 @@
     (completion.options.container || document.body).appendChild(hints);
     var box = hints.getBoundingClientRect(), overlapY = box.bottom - winH;
     var scrolls = hints.scrollHeight > hints.clientHeight + 1
+    var startScroll = cm.getScrollInfo();
+
     if (overlapY > 0) {
       var height = box.bottom - box.top, curTop = pos.top - (pos.bottom - box.top);
       if (curTop - height > 0) { // Fits above cursor
@@ -273,7 +275,6 @@
       cm.on("focus", this.onFocus = function() { clearTimeout(closingOnBlur); });
     }
 
-    var startScroll = cm.getScrollInfo();
     cm.on("scroll", this.onScroll = function() {
       var curScroll = cm.getScrollInfo(), editor = cm.getWrapperElement().getBoundingClientRect();
       var newTop = top + startScroll.top - curScroll.top;