How can I clear the Sigil's Search History?

Hi folks,

I'm using many years the great ebook tool Sigil.
But one feature I'm missing ...
Let me shortly explain:

I read my books with PocketBook 626.
If I find wrong spelling or missing commas or something like that, I mark the text passage.
After reading the book, I open it in the Sigil editor and correct the marked errors.
In order to find the text passages in the book, I enter parts of the sentence.
Over time, many terms have accumulated in the search.

Now the question that arises from this:

How can I empty the search list?

P.S .:
Yes, I know that you can delete the search history in the ini file, but it would be better if this could be done with a right click or an icon switch ...