This is unbelievably slow, Impress is basically unusable in a
non-optimized build; every time you enter or leave text edit mode,
some svx::sidebar::AreaPropertyPanel is created, which loads the color
palette standard.soc, and there are lots of resource lookups for the
strings in there; the std::tie and std::tuple::operator< make those
10x slower.

(regression from d26f7537)

Change-Id: I073b0187f6c173487e781a42c49631cb9ff2e625