feat: add lang string and drag fix

public/language/en-GB/themes/harmony.json

@@ -10,5 +10,6 @@
 	"settings.stickyToolbar": "Sticky toolbar",
 	"settings.stickyToolbar.help": "The toolbar on topic and category pages will stick to the top of the page",
 	"settings.autohideBottombar": "Auto hide bottom bar",
-	"settings.autohideBottombar.help": "The bottom bar on mobile view will be hidden when the page is scrolled down"
+	"settings.autohideBottombar.help": "The bottom bar on mobile view will be hidden when the page is scrolled down",
+	"settings.chatModals": "Enable chat modals"
 }

public/src/modules/chat.js

@@ -266,6 +266,7 @@ define('chat', [
 					chatModal.draggable({
 						start: function () {
 							taskbar.updateActive(uuid);
+							chatModal.css({ bottom: 'auto', right: 'auto' });
 						},
 						stop: function () {
 							module.focusInput(chatModal);