suggester widget: Improved resizing the suggestion list

In $.ui.autocomplete, _resizeMenu() is called before positioning the menu. However,
resizing the menu width has to be performed after positioning since the width shall
be constrained by the browser viewport width.

Change-Id: Idca24ca4518ea75260d3bfe6465f310f50b808c7
Merge "suggester widget: Improved resizing the suggestion list"