Fix crossed notify toggles for project watches

The submit and new changes buttons were cross-wired, causing the one
to impact the other's value.  Fix that, and while we are at it clarify
the names involved so there is less confusion going on.

Change-Id: Ie1b082e35b7a95913a7feb92739f79220a24a983
Signed-off-by: Shawn O. Pearce <sop@google.com>
5 files changed