Merge "Move action.watch to a more suitable place and expose updateWatchLink method...

Merge "Move action.watch to a more suitable place and expose updateWatchLink method in mw.page.watch.  Update method to toggle watch, unwatch list item id attribute. Patchset 2- Expose method with less code duplication, restore comments, cleanup whitespace. Patchset 3-5 Whitespace cleanup Patchset 6 - Trigger a watch event on the updated li Patchset 7 - Only trigger watch event if not updating state, announce opposite of icon action, to properly indicate action taken. Patchset 8 - Cleanup spacing and comments issues, change event namespace. Patchset 9 - actually add the change Change-Id: I591f9f847db391c5d1477dc2ed41de54ec266261"