HPCC-11656 Weird behaviour in search box

Search text is now trimmed by the entry field.
Delay Load Widget would fail if called twice in "quick" succession for the same
item.

Fixes HPCC-11656

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
My comment was a mere syntax change. In JavaScript this is not a big of an issue to create a new instance of Deferred() before checking if (this.deferred)