Make sure that the metadata panel isn't expanded by default in IE

Also fixes issue where stale scroll state from previous image
could be memorised and recalled when closing/reopening MV.

Change-Id: Id29c7b28887afebcb742f49b4d7c20e1210e6c1d
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/996
Bug: 73337