evas textblock: fixed ellipsis character cut off issue with complex markup text.

evas textblock: fixed ellipsis character cut off issue with complex markup text.

Summary:
Evas Textblock ellipsis is handled in a item.
When the ellipsis item is added in the text, some characters are cut off
considering width of ellipsis character.
But, it is handled in only one text item.
If there are many short text item, the ellipsis item can be cut off visually.
And there was a bug in the patch when text is displayed in two lines or more.
The bug is also fixed.

Fixes Phab ticket T1213

@fix

Test Plan: This commit includes test case.

Reviewers: woohyun, seoz, sohyun, tasn, raster

Subscribers: cedric, herdsman

Differential Revision: https://phab.enlightenment.org/D1360