Minor reduce textlabel creation time.

1. Reduce the multiply operations during TypeSetter
combine each glyph on bitmap.

2. Every textlabel hold it's own TextController
and each TextController try to get StyleManager's configure.

In this case, there was some operation
from const Property::Map to Property::Map. It required vector copy.
So I make that we don't copy the vector anymore.

Change-Id: Ie2853b54d8dc0e6685bb11afe7d91faaae0b5acd
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>