"Edit Timestamp" should return false when clicked

[fitztrev]

When clicking "Edit Timestamp", the url changes because the href is followed. This is unnecessary and a 'return false' can be added to the existing jQuery click functions to prevent it.

[fitztrev]

There was also some whitespace at the end of those js files.

[ryan]

(In [6975]) Return false from edit timestamp click handler. Props fitztrev. fixes #5954