Make the old freetype code work with OpenGL2

This patch makes the old freetype glDrawPixles calls work
with OpenGL2. At some point the code really needs to be upgraded
to a more modern approach that would work on ES etc but this
restores functionality that OpenGL2 broke.

Also includes a minor MTime fix for LegendBoxActor

Change-Id: I7d60023df5950932828a98cd5fff29b826a84479
Minor fix for clearing the zbuffer

Change-Id: If81c969da898c41bf6b0910739e73ed528b9ee9a
Merge topic 'depth_clear' into master

d23ec3f0 Minor fix for clearing the zbuffer
Merge topic 'free_type_fix' into master

3d57312f Make the old freetype code work with OpenGL2