Various style tweaks

src/UI/ThemeViewGUI.svelte

@@ -472,13 +472,6 @@
 
   <If condition={state.previewedImage.map((i) => i !== undefined)}>
     <FloatOver on:close={() => state.previewedImage.setData(undefined)}>
-      <button
-        class="absolute right-4 top-4 h-8 w-8 rounded-full p-0"
-        on:click={() => previewedImage.setData(undefined)}
-        slot="close-button"
-      >
-        <XCircleIcon />
-      </button>
       <ImageOperations image={$previewedImage} />
     </FloatOver>
   </If>
@@ -550,7 +543,6 @@
         state.guistate.backgroundLayerSelectionIsOpened.setData(false)
       }}
     >
-      <div class="h-full p-2">
         <RasterLayerOverview
           {availableLayers}
           map={state.map}
@@ -558,7 +550,6 @@
           userstate={state.userRelatedState}
           visible={state.guistate.backgroundLayerSelectionIsOpened}
         />
-      </div>
     </FloatOver>
   </IfHidden>