comctl32: Do not redraw treeview in TVM_INSERTITEM handler if bRedraw is not set, trigger the redraw on WM_SETREDRAW/TRUE.

Simply changing Z-order as we encounter windows is not sufficient to
ensure correct ordering, we have to rebuild the list from scratch.

The name d3d10_effect_variable is somewhat misleading, since these
aren't actually effect variables as returned by e.g.
ID3D10Effect::GetVariableByName(), but effect objects as referenced by
effect passes.

This was originally added as a workaround for a Mesa bug by commit
ddf52dda. The other half of the hack has since
been removed. This code causes problems when wglDeleteContext() from a
different thread causes our current context to be destroyed, since
wglGetCurrentContext() will return a destroyed context in that case. That is a
flaw in our wgl implementation, since wglDeleteContext() shouldn't allow a
context that's current in a different thread to be destroyed, but this hack is
a bad idea regardless.

Translations by Vincent Beers.