Help: Avoid double lookup for help tooltips

Save the HelpItem directly in the tooltip instead of the help ID which
would need to be looked up again.

Change-Id: I107e82e89d9ea26cad9d6532ad4c687d1ac8f1ec
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/texteditor/texteditor.cpp

@@ -3565,7 +3565,7 @@ bool TextEditorWidget::viewportEvent(QEvent *event)
         RefactorMarker refactorMarker = d->m_refactorOverlay->markerAt(pos);
         if (refactorMarker.isValid() && !refactorMarker.tooltip.isEmpty()) {
             ToolTip::show(he->globalPos(), refactorMarker.tooltip,
-                          viewport(), QString(), refactorMarker.rect);
+                          viewport(), {}, refactorMarker.rect);
             return true;
         }