TDI-31425 fix bug: If import items operation choose wrong root
folder(lots subfolder under it), then importing operation will never
stop.
https://jira.talendforge.org/browse/TDI-31425

Conflicts:
	main/plugins/org.talend.repository.items.importexport.ui/src/main/java/org/talend/repository/items/importexport/ui/wizard/imports/ImportItemsWizardPage.java
TDI-31425 fix bug: If import items operation choose wrong root
folder(lots subfolder under it), then importing operation will never
stop.
https://jira.talendforge.org/browse/TDI-31425

Do some improvement
TDI-31425 fix bug: If import items operation choose wrong root
folder(lots subfolder under it), then importing operation will never
stop.
https://jira.talendforge.org/browse/TDI-31425

Do some improvement