Spell checker: user cannot ignore multiple words using button

Calibre 5.38 / Linux Mint 20.1

There is an inconsistency with the spellchecker UI. If you select multiple words in the list, you can choose "Ignore all selected words" with the right-click dialogue. But the button to the right of the list only allows you to ignore the final word in the selection.

:bulb2: SUGGESTION: Modify the "Ignore" button command and label so that it applies to all the selected (highlighted) words in the list.