added ScenePanel
Merge pull request #28 from slima4/master

added ScenePanel
fix .pro
drag&drop - show current widget and set min resize size
чистка
background for preview
fix layers table
fix
Merge branch 'master' of https://github.com/slima4/zgui-qt
merge
сцены - красным, слои-цианом
fix port for MacOS
small refactor + add subscene
fix
merge
change rePosition
fix
manual merge for issue 24
Merge remote-tracking branch 'upstream/master'

Conflicts:
	boxwidget.cpp
	mainwindow.ui
	zgui-qt.pro
Merge remote-tracking branch 'upstream/master'