Small UI tweaks for studio, improve linting and typing

src/UI/Studio/EditLayer.svelte

@@ -17,8 +17,6 @@
   import QuestionPreview from "./QuestionPreview.svelte"
   import ShowConversionMessages from "./ShowConversionMessages.svelte"
   import RawEditor from "./RawEditor.svelte"
-  import NextButton from "../Base/NextButton.svelte"
-  import BackButton from "../Base/BackButton.svelte"
   import DeleteButton from "./DeleteButton.svelte"
   import StudioHashSetter from "./StudioHashSetter"
 
@@ -84,7 +82,7 @@
 </script>
 
 <div class="flex h-screen flex-col">
-  <div class="my-2 flex w-full justify-between">
+  <div class="my-2 flex flex-wrap w-full justify-between">
     <slot />
     {#if $title === undefined}
       <h3>Creating a new layer</h3>

src/UI/Studio/EditLayerState.ts

@@ -292,7 +292,7 @@ class ContextRewritingStep<T> extends Conversion<LayerConfigJson, T> {
                 return undefined
             }
             const newPath = [...path]
-            const idToSearch = newTagRenderings[newPath[1]].id
+            const idToSearch = newTagRenderings[newPath[1]]?.id ?? ""
             const oldIndex = originalIds.indexOf(idToSearch)
             if (oldIndex < 0) {
                 console.warn("Original ID was not found: ", idToSearch)

src/UI/StudioGUI.svelte

@@ -367,7 +367,7 @@
     {:else if state === "editing_layer"}
       <EditLayer state={editLayerState} {backToStudio}>
         <BackButton clss="small p-1" imageClass="w-8 h-8" on:click={() => backToStudio()}>
-          MapComplete Studio
+            Studio
         </BackButton>
       </EditLayer>
     {:else if state === "editing_theme"}