If a string is pasted into the Open Type dialog it is automatically
cleaned up to the included type name by best effort.

Change-Id: Ibc79ea1ed3a17d95cd66d2c4388d5d4803250bb7
Signed-off-by: Joerg Kubitz <jkubitz-eclipse@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.ui/+/186496
Tested-by: JDT Bot <jdt-bot@eclipse.org>
Reviewed-by: Noopur Gupta <noopur_gupta@in.ibm.com>