ECMS-6078: Unknown error and exception thrown when removing a document in CLV page

Fix description:
  - Hide non exist node in CLV PReference
  - Check for null variable in UICLVManualMode.java

Conflicts:
	apps/portlet-presentation/src/main/java/org/exoplatform/wcm/webui/clv/UICLVConfig.java
ECMS-6078: Unknown error and exception thrown when removing a document in CLV page

Fix description:
  - Add a log in the catch block exception to avoid empty code block
ECMS-6078: Update log level in NodeLocation#getNodeListByLocationList