Digital PCT265 defect CXTDT-579049: Fix indexing safety to mocules to add. (Another crash in App Store reports.)

MVMCoreUI/Atomic/Molecules/Items/TabsListItemModel.swift

@@ -108,8 +108,7 @@ extension TabsListItemModel: AddMolecules {
     public func moleculesToAdd() -> AddMolecules.AddParameters? {
         guard addedMolecules == nil else { return nil }
         let index = tabs.selectedIndex
-        guard molecules.count >= index else { return nil }
-        let addedMolecules = molecules[index]
+        guard let addedMolecules = molecules[safe: index] else { return nil }
         self.addedMolecules = addedMolecules
         return (addedMolecules, .below)
     }