Fix tabs and generally unbreak JS in viewing pages

This disables the onhashchange tab switching behavior- we're going to be
getting rid of the tabs soon anyway.
Fix display of related topics in topic pages

Both in the header and for topics related to a topic's related notes
(sorry for that phrase)
Add a persistent button to submit feedback
Hide feedback button when clicked
Add large default size for related topic search in item viewing

This prevents things like limiting related notes to say, 10
Delete a couple mistakes

a couple mistakes
Merge pull request #231 from editorsnotes/viewing-interface

Fix tabs, bugfixes, feedback button.