Make spinner appear immediately when clicking edit

Moved the spinner code from ViewPageTarget to ViewPageTarget.init to make it appear immediately on clicking edit.
Bonus: also fixes the URL to add the parameter vesection when clicking a section edit link.

Bug: 65453
Change-Id: Ica33de675203cc0f0594b8362731c4e98a644313
Merge "Make spinner appear immediately when clicking edit"