Evas Textblock: Fix text disappear issue when text is made up with multiple items.

Evas Textblock: Fix text disappear issue when text is made up with multiple items.

Summary:
Text is disappearing when we resize a singleline Evas Textblock with ellipsis.
It is happened by putting a Text item at logical_items list without considering about logical position.
It is only happended the text is made up with multiple items.
@fix

Test Plan:
1. Run elementary_test
2. Click Label Ellipsis
3. Resize the window dynamically and see the result.

Reviewers: woohyun, tasn, herdsman

Subscribers: jpeg, subodh6129, shilpasingh, cedric

Maniphest Tasks: T2709

Differential Revision: https://phab.enlightenment.org/D3022

Change-Id: I8ec611fbddbb8fab1cd9706d4fc16f82ae87891f