tdf#130857 qt weld: Implement QtInstanceMenuButton::insert_item HEADmaster

Add initial implementation for QtInstanceMenuButton::insert_item.
See also QtBuilder::insertMenuObject which partially has the
same logic.

Handling for radio or check items is not implemented yet,
so assert that `eCheckRadioFalse` is `TRISTATE_INDET` for now.

This will e.g. be used by the "File" -> "Templates"
-> "Manage Templates" dialog once that one is supported.

Change-Id: Ib34d6b61b26ae900eac3b34b68224e6ac2e11711
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/180250
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

0 files changed, 0 insertions, 0 deletions