besh81 dc23624ee6 Add listbox::clear_headers() and menubar::clear() ...

Added listbox::clear_headers() to remove all the columns from the listbox
Added menubar::clear() to remove all the items from menubar

2018-02-23 16:14:10 +01:00

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nana

Add listbox::clear_headers() and menubar::clear()

2018-02-23 16:14:10 +01:00