Switch to vue-at for comment mentions

Signed-off-by: Julius Härtl <jus@bitgrid.net>

src/helpers/mentions.js

@@ -0,0 +1,23 @@
+const rawToParsed = (text) => {
+	text = text.replace(/<br>/g, '\n')
+	text = text.replace(/&nbsp;/g, ' ')
+
+	// Since we used innerHTML to get the content of the div.contenteditable
+	// it is escaped. With this little trick from https://stackoverflow.com/a/7394787
+	// We unescape the code again, so if you write `<strong>` we can display
+	// it again instead of `&lt;strong&gt;`
+	const temp = document.createElement('textarea')
+	temp.innerHTML = text
+	text = temp.value
+
+	// Although the text is fully trimmed, at the very least the last
+	// "\n" occurrence should be always removed, as browsers add a
+	// "<br>" element as soon as some rich text is written in a content
+	// editable div (for example, if a new line is added the div content
+	// will be "<br><br>").
+	return text.trim()
+}
+
+export {
+	rawToParsed,
+}