DEV-32540: Lots of object IM and SLurl improvements

- Don't let object names that are URLs override links to display the
  remote object inspector

- Don't hyperlink the object name in the remote object inspector

- Made the <nolink>...</nolink> regex more robust and made it support
  non-URLs between the tags, so that we don't get random <nolink> tags
  when trying to disable URLs in user-typed text.

- Improved the llurlentry unit test and added some more test cases.

- Hooked up another LLViewerMessage code path to objectim SLapps to
  pass down the owner and slurl information.

- Made a few LLUrlEntryBase methods be const methods, because they are

- Fixed a bug in the remote object inspector where it would never show
  the teleport URL.