Move MoreScreen to svelte

UI/BigComponents/HiddenThemeList.svelte

@@ -0,0 +1,37 @@
+<script lang="ts">
+  import { OsmConnection } from "../../Logic/Osm/OsmConnection"
+  import { UIEventSource } from "../../Logic/UIEventSource"
+  import type Loc from "../../Models/Loc"
+  import * as themeOverview from "../../assets/generated/theme_overview.json"
+  import { Utils } from "../../Utils"
+  import ThemesList, { type Theme } from "./ThemesList.svelte"
+  import Translations from "../i18n/Translations"
+
+  export let search: UIEventSource<string>
+  export let state: { osmConnection: OsmConnection; locationControl?: UIEventSource<Loc> }
+  export let onMainScreen: boolean = true
+
+  const prefix = "mapcomplete-hidden-theme-"
+  const hiddenThemes: Theme[] = themeOverview["default"].filter((layout) => layout.hideFromOverview)
+  const userPreferences = state.osmConnection.preferencesHandler.preferences
+  const t = Translations.t.general.morescreen
+
+  $: knownThemesId = Utils.NoNull(
+    Object.keys($userPreferences)
+      .filter((key) => key.startsWith(prefix))
+      .map((key) => key.substring(prefix.length, key.length - "-enabled".length))
+  )
+  $: knownThemes = hiddenThemes.filter((theme) => knownThemesId.includes(theme.id))
+</script>
+
+<ThemesList {search} {state} {onMainScreen} themes={knownThemes} isCustom={true} hideThemes={false}>
+  <svelte:fragment slot="title">
+    <h3>{t.previouslyHiddenTitle.toString()}</h3>
+    <p>
+      {t.hiddenExplanation.Subs({
+        hidden_discovered: knownThemes.length.toString(),
+        total_hidden: hiddenThemes.length.toString(),
+      })}
+    </p>
+  </svelte:fragment>
+</ThemesList>