Evas Text: Fix width of BiDi text

Evas Text: Fix width of BiDi text

Summary: BiDi text is truncated because the way we find the last visual item in text object is wrong.
This patch is similar with _line_native_last_visual_get function in textblock.

Reviewers: cedric, tasn, herdsman

Subscribers: id213sin, cedric, jpeg

Differential Revision: https://phab.enlightenment.org/D3947
(commit id: d22850848dc91eccc1995eb0a5e873fc27430d32)

Signed-off-by: Minwoo, Lee <minwoo47.lee@samsung.com>
Change-Id: Iec239ad7edad9eb688a7430dd4384842093efaa2