Revert "Revert "Revert "Revert "wrong merge conflict resolution, vcldemo, icontest go to instdir""""

This reverts commit bf9435bce063da95deb8a52371bce04e7435c966.
remove unnecessary whitespace

Change-Id: I0dda7886718b0e3ff81a0d6d43cca2887877ea9d
make something visible on the screen again

Why do we still use a double buffered FBC? It apparently works in the
feature/opengl-vcl branch.

Change-Id: I48b6879b9a9f7fec67f4da25cade46a32d8ad6fa