This change allows use of the full text renderer capabilities
for legend titles, subtitles, and item text. It allows buffers,
shadows, font spacing control, and all over options (including
mixed HTML formatting!) which is permitted for use in text
formats.
symbols to the left OR symbols to the right of legend text), and
alignment for group/subgroup/item text
Allows creation of right-to-left locale friendly legends. Additionally,
we default to this right-to-left style alignment when creating new
legends under a RTL based locale.
