Repeated pinch zoom caused image to annoyingly jump back to center.

Change-Id: I2134d091a33c1c98e4616214b737c8f032c48d40
Size image to fit screen more precisely on details view.

Performance of transition to details view also improved.

Change-Id: I8b4a823bfbd57fa63e37614f6d6c73fe19ec5b7f
Fixes for details fullscreen toggle.

Change-Id: I9cbdc9659ac96fd783f88bad420f25ce729a724d
Fix for darkening area above details slider not extending far enough.

Seen on iPad.

Change-Id: If57fc04e1ae4fb87089a580c4976daf197bfe231