Factored getscrollbarwidth utility function out of suggester widget

Change-Id: Ia30b621e3e9d88b5399d57d40a8b67a8e6a82f6e
$.ui.suggester: Suppress autocomplete's native blur handling

(bug 44896)
By suppressing autocomplete's native blur handling, the auto-completed string will not be dropped
when blurring the list of suggestions.

Change-Id: Ic47433bc2efc59c8d408d962cc4b9b2a1190d903
Merge "Factored getscrollbarwidth utility function out of suggester widget"
Merge "$.ui.suggester: Suppress autocomplete's native blur handling"