Delaying GlobeCoordinate input expert's API request

Minimizes the number of parse requests that will not be handled when the value has been
overwritten before the API request returns.
(Requires change Iffcbe2d08aea92eb22129e1ee43e6c5b1dde6464 in Wikibase extension for the
Selenium tests to run properly.)

Change-Id: I5f46bdb630fc61022be7205e5912cbff8462a5f9
Merge "Delaying GlobeCoordinate input expert's API request"