- Minor fixes in code:
	- UsersList instance in MainWindow is created without parent.
	- QSplitter instances in RenderPanel are given a orientation when constructed.
	- RenderPanel::renderIfNeeded() now calls ViewFrame::renderIfNeeded() if RenderPanel::forceRender_ == false.
	- Removed unused code.
	- Removed a call to Mesh::translate() in Camera constructor.