Add icon picker to room create component

src/lib/components/EmojiButton.svelte

@@ -1,5 +1,4 @@
 <script lang="ts">
-  import {onDestroy} from "svelte"
   import {type Instance} from "tippy.js"
   import type {NativeEmoji} from "emoji-picker-element/shared"
   import {between, throttle} from "@welshman/lib"
@@ -27,10 +26,6 @@
   })
 
   let popover: Instance | undefined = $state()
-
-  onDestroy(() => {
-    popover = undefined
-  })
 </script>
 
 <svelte:document onmousemove={onMouseMove} />