devel/ayatana-ido: update to v0.9.3, pet portfmt, enable docs

• cmake: Enable building tests by default.
• tests: Fix building against modern GTest.
• src/idobasicmenuitem.c: Set secondary text and count with lozenge from menu model.

With hat: ports-sec team

(cherry picked from commit 27120a02bd6d5f43466d3bcfd03cdef9a6fc9d5a)