Changed the handle type from "bottom" to "top" when the handle go to the bottom of the visible webview area.
[Title] Changed the handle type from "bottom" to "top" when the handle go to the bottom of the visible webview area.
[Issue#] N_SE-40983
[Problem] If the handle go to the bottom of visible webview area,
the handle is not selected well.
[Cause] The handle is truncated on the visible webview area.
[Solution] When the handle go to the bottom of the visible webview area,
changed the handle type from "bottom" to "top".
Change-Id: I7557c7a1a02e169629d220966335bbc554321d53