re-enable workspace location prompt on startup (#238)

Signed-off-by: Didier Vojtisek <[email protected]>

Author: dvojtise

gemoc_studio/releng/org.eclipse.gemoc.gemoc_studio.updatesite/gemoc_studio.product

@@ -21,6 +21,7 @@ openFile
       </programArgs>
       <vmArgs>-Dosgi.requiredJavaVersion=11
 [email protected]/eclipse-workspaces/gemoc-workspace
+-Dosgi.dataAreaRequiresExplicitInit=true
 -XX:+UseG1GC
 -XX:+UseStringDeduplication
 -Dosgi.framework.extensions=org.eclipse.fx.osgi