Elm_Spinner: UI Concept change fix.

Elm_Spinner: UI Concept change fix.

Older UI concept: when text in spinner's entry is inputted and text is
not committed yet and when inc/dec is clicked. do not commit text and
reset the value to older original value.

New UI concept:
When Text in spinner's entry is inputted and text is not committed yet
and when inc/dec buttons are clicked.
Commit the entry's text and inc/dec accordingly.
If entry' s text is already modified owing to min/max update, then do not inc/dec.

Signed-off by: Shilpa Singh <shilpa.singh@samsung.com>