Replace tldjs usage for omnibar URL test
Replace tldjs usage for omnibar URL test

- omnibar onEnter does different things depending on if a URL was detected in the text input
- tldjs gave false positives as its `isValid` function checks domain rather than URLs in general, hence bug in #111 (as we now support `domain.tld` pattern detection in search)
- move to `url-regex` package's pattern for doing the test which properly distinguishes between full URL and `domain.tld` pattern

WorldBrain/WebMemex,WorldBrain/WebMemex