Code review comment for lp:~nick-dedekind/unity/phablet-greeter-indicators

I don't think we should have tap to open on indicators in the greeter. It feels like a gesture that is too easy and would be prone to lots of accidental taps.

Tapping in the top part of the greeter screen should trigger a hint that the indicator menus open. (hint = reveal a small section of the indicator menu, and then fairly quickly hide it.)

This is similar to what we plan for the launcher, see Michael Zanetti's ~mzanetti/unity/phablet-tease-launcher