Changes

Fix Bug 2339:Responsiveness issue in UI if name(NSD/VNFD/VIM) is too
long
	-Added the horizonal scroll in the dropdown of ng-select
Change-Id: I1119e439c7c4c82f93b6da9be29b9212bba8c7b7 Signed-off-by:
SANDHYA.JS <sandhya.j@tataelxsi.co.in>
(cherry picked from commit 29c52a9b8f1c467c7a77c2c374ba26bbf99a1781)