Admin: Use compact styles in Events dashboard widget.

Change the inputs for setting event location to use the compact input heights.

Props joen, audrasjb, huzaifaalmesbah, amesplant, joedolson.
Fixes #64777.

git-svn-id: https://develop.svn.wordpress.org/trunk@61852 602fd350-edb4-49c9-b593-d223f7449a82