Fix: substituteKeys works correctly if newline is in the text, fix 'send email to report broken'-button by porting it to svelte

src/UI/Popup/SendEmail.svelte

@@ -0,0 +1,31 @@
+<script lang="ts">
+  
+  import type { OsmTags } from "../../Models/OsmFeature";
+  import Svg from "../../Svg";
+  import ToSvelte from "../Base/ToSvelte.svelte";
+  import { Utils } from "../../Utils";
+
+  export let tags: Store<OsmTags>
+  export let args: string[]
+
+  let [to, subject, body, button_text] = args.map(a => Utils.SubstituteKeys(a, $tags))
+  let url = "mailto:" +
+    to +
+    "?subject=" +
+    encodeURIComponent(subject) +
+    "&body=" +
+    encodeURIComponent(body)
+  $: console.log(url)
+  console.log(">>> args", args)
+</script>
+<a class="button flex items-center w-full" href={url}>
+  <ToSvelte construct={Svg.envelope_svg().SetClass("w-8 h-8 mr-4 shrink-0")}/>
+  {button_text}
+</a>
+SEND EMAIL to {to} 
+<br/>
+subject: {subject}
+<br/>
+body: {body}
+<br/>
+{button_text}