Although these formats aren't lockable, we still explicitly set the initial
surface data when creating the texture. Unfortunately that means we'll need
the conversion functions, even though all they'll ever convert will be zeroes.

comdlg32: Delay setting the initial size of resizable file dialog until the CDN_INITDONE notification has been processed.

comctl32/listview: Setting item text to callback stub value already having it raises item-change notifications.

Use same new text comparison rules for both items and subitems.
Based on patch by Stefan Stranz.