SOC-3751 | CLONE - Slowness in displaying Space activities
SOC-3756 | UISpaceNavigationPortlet: Slowness in getLastAccessedSpace

Conflicts:
	component/core/src/main/java/org/exoplatform/social/core/storage/impl/SpaceStorageImpl.java
	component/webui/src/main/java/org/exoplatform/social/webui/Utils.java

Conflicts:
	component/webui/src/main/java/org/exoplatform/social/webui/Utils.java
SOC-3756 | UISpaceNavigationPortlet: Slowness in getLastAccessedSpace - fixed unit test failed
SOC-3722 | [Space API] Provide an API to return browsed/never be browsed spaces