Review of many feature switches and iframe context; fix OH-vis when ranges are not given

src/UI/ThemeViewGUI.svelte

@@ -124,11 +124,11 @@
   state.mapProperties.installCustomKeyboardHandler(viewport)
   let canZoomIn = mapproperties.maxzoom.map(
     (mz) => mapproperties.zoom.data < mz,
-    [mapproperties.zoom]
+    [mapproperties.zoom],
   )
   let canZoomOut = mapproperties.minzoom.map(
     (mz) => mapproperties.zoom.data > mz,
-    [mapproperties.zoom]
+    [mapproperties.zoom],
   )
 
   function updateViewport() {
@@ -165,7 +165,7 @@
   onDestroy(
     rasterLayer.addCallbackAndRunD((l) => {
       rasterLayerName = l.properties.name
-    })
+    }),
   )
   let previewedImage = state.previewedImage
 
@@ -196,7 +196,7 @@
   let openMapButton: UIEventSource<HTMLElement> = new UIEventSource<HTMLElement>(undefined)
   let openMenuButton: UIEventSource<HTMLElement> = new UIEventSource<HTMLElement>(undefined)
   let openCurrentViewLayerButton: UIEventSource<HTMLElement> = new UIEventSource<HTMLElement>(
-    undefined
+    undefined,
   )
   let _openNewElementButton: HTMLButtonElement
   let openNewElementButton: UIEventSource<HTMLElement> = new UIEventSource<HTMLElement>(undefined)
@@ -478,7 +478,7 @@
     <FloatOver on:close={() => state.guistate.themeIsOpened.setData(false)}>
       <span slot="close-button"><!-- Disable the close button --></span>
       <TabbedGroup
-        condition1={state.featureSwitches.featureSwitchFilter}
+        condition1={state.featureSwitches.featureSwitchEnableExport}
         tab={state.guistate.themeViewTabIndex}
       >
         <div slot="post-tablist">
@@ -572,9 +572,14 @@
         <div class="link-underline links-w-full m-2 flex flex-col gap-y-1" slot="content0">
           <Tr t={Translations.t.general.aboutMapComplete.intro} />
 
+
           <a class="flex" href={Utils.HomepageLink()}>
             <Add class="h-6 w-6" />
-            <Tr t={Translations.t.general.backToIndex} />
+            {#if Utils.isIframe}
+              <Tr t={Translations.t.general.seeIndex} />
+            {:else}
+              <Tr t={Translations.t.general.backToIndex} />
+            {/if}
           </a>
 
           <a class="flex" href="https://github.com/pietervdvn/MapComplete/" target="_blank">