Fix for onboarding login lockup.

Change-Id: I84ed09467e07b78913b618cea6a1485443719872
fix for linking to pages with fragments

* updates MWPageTitle class a bit, which wasn't previously used
* sticks it in the middle of link handling briefly to remove the fragment
* if there's a fragment, jumps to it after inserting text

todo:
* switch the JS scrolling to animate the webview directly; tried it
  but had some trouble getting it to work consistently

Change-Id: Ib203d62ab2499cceaa72604285751b7f93460afc
Merge "fix for linking to pages with fragments"