Do not show tooltip when completer is active (#10588)

packages/tooltip-extension/schema/notebooks.json

@@ -10,7 +10,7 @@
     {
       "command": "tooltip:launch-notebook",
       "keys": ["Shift Tab"],
-      "selector": ".jp-Notebook.jp-mod-editMode .jp-InputArea-editor:not(.jp-mod-has-primary-selection):not(.jp-mod-in-leading-whitespace)"
+      "selector": ".jp-Notebook.jp-mod-editMode .jp-InputArea-editor:not(.jp-mod-has-primary-selection):not(.jp-mod-in-leading-whitespace):not(.jp-mod-completer-active)"
     }
   ],
   "properties": {},