Accidental clicks when scrolling

[ptrwtts]

With momentum based scrolling, the user will often stop scrolling by "grabbing" the page to hold it in place and read something. However, in Ionic, their "grab" is counted as a "click". In a scrollview with lots of links (e.g. a Twitter feed), this causes lots of unintentional clicks. Most native apps (Twitter, Facebook, etc) ignore any clicks while the page is moving. Ionic should do the same.

If there is a way disable these clicks manually (e.g. by checking if the scrollview is moving, then ignoring clicks), that could be a temporary solution.

[adamdbradley]

Duplicate of #1438