Bug #1607: Fix issue filtering the resources load window

The issue was introduced in commit 05132fd5a75a6b44ee7e15b49bac233008f708a7.
Where it was defined an algorithm:
  2.4) FSD is not null and FED is not null:
    2.4.1) APED is null: Check if APSD is between FSD and FED

This was wrong, it should be:
  2.4) FSD is not null and FED is not null:
    2.4.1) APED is null: Check if APSD is lower or equals than FSD or APSD is
    lower or equals than FED

FEA: ItEr77S04BugFixing