view_manager_scroll: fix not to move view position by click
Previously, view position was moved by click because transition
information was initialized in mouse move instead of mouse down.
Now, transition information is initialized in mouse down so view
position is not moved by click.
- Run Efl.Ui.Active_View Scroll
- Click Next button 2 times
- Click Button Page
- Drag Button Page a bit to the left and click multiple times
Reviewed By: bu5hm4n
Differential Revision: https://phab.enlightenment.org/D9173