Save storage overlay data properly

TODO.txt

@@ -5,7 +5,6 @@ Priority 1:
 - recipes
     - more recipe categories
 - dfu cache
-- Storage Overlay
 - PV
 - NEU buttons
 - Pet/Equipment hud in inventory
@@ -21,6 +20,8 @@ Priority 1:
 
 Priority 2:
 - missing talismans / pets in pv
+- renameable storage pages
+- storage overlay slot handling (instead of shortcut page)
 - item overlays
     - tree capitator
     - builders wand

src/main/kotlin/moe/nea/firmament/features/inventory/storageoverlay/StorageOverlay.kt

@@ -52,6 +52,7 @@ object StorageOverlay : FirmamentFeature {
             is StorageBackingHandle.Overview -> rememberStorageOverview(handler, data)
             is StorageBackingHandle.Page -> rememberPage(handler, data)
         }
+        Data.markDirty()
     }
 
     private fun rememberStorageOverview(