TextField cannot lose it's focus

[dongsug-song]

copied from https://github.sec.samsung.net/NUI/TizenNUISamples/issues/158

Source: Main Page
Issue : Cannot escape textfield focus.
Frequency : Always

Step 1. Set focus on click mode need to be implemented in DALi and NUI.
Step 2. Apply Focusable and FocusableOnClick in NUI Controls as their on demand(such as button, item, page... etc).