Replace links with HTML <a> tags when messages have a formatted_body and in all other cases

This makes (https) links show up as actual links when they're in a message with a `formatted_body`. For example, the pursuivant messages in any KDE channel (like #kirigami), or links which are in a reply to another message/image.

Also corrected a regex mistake in another place using the same link replacement regex.

Fix #331

imports/NeoChat/Panel/RoomDrawer.qml

@@ -194,7 +194,7 @@ Kirigami.OverlayDrawer {
                 TextEdit {
                     Layout.fillWidth: true
                     text: room && room.topic ? room.topic.replace(replaceLinks, "<a href=\"$1\">$1</a>") : i18n("No Topic")
-                    readonly property var replaceLinks: /\(https:\/\/[^ ]*\)/
+                    readonly property var replaceLinks: /(https:\/\/[^ ]*)/
                     textFormat: TextEdit.MarkdownText
                     wrapMode: Text.WordWrap
                     selectByMouse: true