Clear autocomplete input on selection accept (#12709)

* Clear autocomplete input on selection accept

Fixes https://github.com/element-hq/element-web/issues/27194

* Playwright: use rust crypto for the bot user (#12708)

... because legacy crypto is legacy

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Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

src/components/structures/AutocompleteInput.tsx

@@ -99,6 +99,8 @@ export const AutocompleteInput: React.FC<AutocompleteInputProps> = ({
 
         onSelectionChange(newSelection);
         focusEditor();
+        setQuery("");
+        setSuggestions([]);
     };
 
     const removeSelection = (completion: ICompletion): void => {