tags-input:

* add a "copy" button
* fix some css class (adding a prefix to avoid side effects)
* other minor fixes

languages/en.yml

@@ -12,6 +12,7 @@ transparent_background: "Transparent background (for stream integration, with OB
 tips_for_streamers: "Tips for streamers: To add the chat to your OBS, generate a read-only
   link and use it as a browser source."
 copy: "Copy"
+copied: "Copied"
 link_copied: "Link copied"
 error: "Error"
 open: "Open"