hoversel: refactor a bit to avoid code duplication.

hoversel: refactor a bit to avoid code duplication.

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   hoversel: refactor a bit to avoid code duplication.

   Summary:
   Avoid code duplication

   Two dismissal signals at two different places
   created some confusion and also code is duplicated.
   Also removed some extra space.

   Test Plan: NA

   Reviewers: cedric

   Differential Revision: https://phab.enlightenment.org/D3269

   Conflicts:
           src/lib/elc_hoversel.c
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Signed-Off-By: Jee-Yong Um <jc9.um@samsung.com>
Change-Id: Ia8ebbaff23dd3a2ad938fc96a95204dac9f260bb