Performance: sprinkle 'onDestroy' everywhere to cleanup old stores; cleanup 'Stores' utility class

src/UI/InputElement/Helpers/DistanceInput.svelte

@@ -20,6 +20,7 @@
   import LayerConfig from "../../../Models/ThemeConfig/LayerConfig"
   import Translations from "../../i18n/Translations"
   import Tr from "../../Base/Tr.svelte"
+  import { onDestroy } from "svelte"
 
   export let value: UIEventSource<number>
   export let feature: Feature
@@ -84,7 +85,7 @@
         },
       ]
     },
-    [mapLocation]
+    [mapLocation], onDestroy
   )
 
   new ShowDataLayer(map, {

src/UI/InputElement/Helpers/FloorSelector.svelte

@@ -79,7 +79,7 @@
     forceIndex = floors.data.indexOf(level)
   })
 
-  Stores.Chronic(50).addCallback(() => stabilize())
+  Stores.chronic(50).addCallback(() => stabilize())
   floors.addCallback((floors) => {
     forceIndex = floors.findIndex((s) => s === value.data)
   })

src/UI/InputElement/Helpers/SlopeInput.svelte

@@ -7,6 +7,7 @@
   import { GeoOperations } from "../../../Logic/GeoOperations"
   import If from "../../Base/If.svelte"
   import type { SpecialVisualizationState } from "../../SpecialVisualization"
+  import { onDestroy } from "svelte"
 
   /**
    * The value exported to outside, saved only when the button is pressed
@@ -61,7 +62,7 @@
     } else {
       return -1
     }
-  })
+  }, onDestroy)
 
   beta.map(
     (beta) => {
@@ -77,7 +78,7 @@
       previewDegrees.setData(beta + "°")
       previewPercentage.setData(degreesToPercentage(beta))
     },
-    [valuesign, beta]
+    [valuesign, beta], onDestroy
   )
 
   function onSave() {

src/UI/InputElement/Helpers/WikidataInput.svelte

@@ -5,7 +5,7 @@
 
   import Translations from "../../i18n/Translations"
   import Tr from "../../Base/Tr.svelte"
-  import { ImmutableStore, Store, Stores, UIEventSource } from "../../../Logic/UIEventSource"
+  import { ImmutableStore, Store, UIEventSource } from "../../../Logic/UIEventSource"
   import Wikidata, { WikidataResponse } from "../../../Logic/Web/Wikidata"
   import Locale from "../../i18n/Locale"
   import Loading from "../../Base/Loading.svelte"
@@ -64,7 +64,7 @@
         })
         WikidataValidator._searchCache.set(key, promise)
       }
-      return Stores.FromPromiseWithErr(promise)
+      return UIEventSource.fromPromiseWithErr(promise)
     }
   )
 

src/UI/InputElement/ValidatedInput.svelte

@@ -173,7 +173,7 @@
     )
   }
 
-  const isValid = unvalidatedText.map((v) => validator?.isValid(v, getCountry) ?? true)
+  const isValid = unvalidatedText.map((v) => validator?.isValid(v, getCountry) ?? true, onDestroy)
 
   let htmlElem: HTMLInputElement | HTMLTextAreaElement