Size width of Quick Open dropdown more crisply.

Revert PR adobe#7316 - no longer needed to fix adobe#7307.
Tweak the PR adobe#7358 fix to cut down the delay before the dropdown appears to
the bare minimum.

Author: peterflynn

src/search/QuickSearchField.js

@@ -242,7 +242,7 @@ define(function (require, exports, module) {
                     position: "absolute",
                     top: this._dropdownTop,
                     left: this.$input.offset().left,
-                    width: this.$input.width()
+                    width: this.$input.outerWidth()
                 })
                 .click(function (event) {
                     // Unlike the Enter key, where we wait to catch up with typing, clicking commits immediately