resizable lanes, restoring elements size
Merge branch 'master' of https://github.com/qreal/qreal into containers
moving children out of container (there are bugs with container expanding)
parent highlighting fixed
container folding button changed
fixed container expantion bug
Merge branch 'containers' of github.com:Ashatta/qreal into containers
fixed aligning of square links
quick element moving with grid fix
elements in sorting container fix
no expanding containers
Delete edge if container was deleted.
Delete edge with container.
jumps of elements in sorting container are fixed
Merge branch 'Elements' of https://github.com/IrinaShkviro/qreal
refactored a little bit
comment is added
whitespaces
Merge pull request #886 from Ashatta/containers

Улучшения контейнеров
Merge branch 'containers' of https://github.com/Ashatta/qreal into grid

Conflicts:
	qrgui/umllib/nodeElement.cpp