Refactored to external class methods to handle filters session parameters

FEA: ItEr77S15FilteringEnhancements
Enabled WBS to write filter changes on the session

FEA: ItEr77S15FilteringEnhancements
Read user criterion parameter inside resourcesLoad perspective

FEA: ItEr77S15FilteringEnhancements
Moved session parameters handling on Resources Load to refactored methods

FEA: ItEr77S15FilteringEnhancements