fix: apply imported config selections to lazily-built tabs (#4938)

Tabs other than Install build their checkboxes lazily on first visit.
Import populates $sync.selected* and calls Reset-WPFCheckBoxes, but
that only touches checkboxes that already exist in $sync, so any tab
not yet visited gets its controls built later with default (unchecked)
state and never reflects the import. Re-apply Reset-WPFCheckBoxes right
after a tab's controls are built so it picks up existing selections.

functions/private/Initialize-WinUtilTabContent.ps1

@@ -36,4 +36,7 @@ function Initialize-WinUtilTabContent {
     }
 
     $sync.InitializedTabs[$TabName] = $true
+
+    # Sync freshly built controls to any selections already in $sync.selected* (import/preset).
+    Reset-WPFCheckBoxes -doToggles $true
 }