Added methods flagFixed and getUnfixedElems to header_global.js

They should already be here (since commit 172b2e5), but they seem to have vanished in some conflict wreak.
Bugfix: Replaced flagging fixed on tabContainer level with flagging on DetailsContent.
Bugfix: fixed tabDetailContent ul -> dl transformation.
Done a tiny bit of chaining in tabDetailContent now that the chain bug was fixed (76a1d54).
Transforming EXLLocationTable into some bootstrapish div hierachy.

Still needs a bit work - collapsible stuff does not work properly and it needs to be styled.