Merge pull request #15580 from atom/as-update-scrollbars-on-detach-reattach

Flush scroll position to dummy scrollbar components on re-attach

src/text-editor-component.js

@@ -1403,6 +1403,9 @@ class TextEditorComponent {
 
       if (this.isVisible()) {
         this.didShow()
+
+        if (this.refs.verticalScrollbar) this.refs.verticalScrollbar.flushScrollPosition()
+        if (this.refs.horizontalScrollbar) this.refs.horizontalScrollbar.flushScrollPosition()
       } else {
         this.didHide()
       }