[DF-1534] Added context menu.
Added sorting.
Fixed drag'n'drop.
Fixed item highlighting.
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-3267][DF-3263] add SetTemplate/GetTemplate property for material, fix skybox material editing
Merge branch 'origin/development'
[DF-3253] Added materials assignable.yaml and quality.yaml parsing into ProjectManager
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-2877] - controls relative position is stored while copy-paste.
Merge branch 'development' of https://github.com/dava/dava.framework into development
Merge pull request #243 from abaradulkin/development

DF-291 fixes for autotesting on android (loading lua files from apk)
[DF-3252] Added update for imported controls properties data.
[DF-3267] added undo/redo after setting material template
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-3279] - UIWebView is hidden/shown while removing/adding to hierarchy.
[DF-291] Fix resource releasing after using FILE and new.
Merge branch 'development' of https://github.com/dava/dava.framework into development
[DF-291] Debug for searching the reason of file blocking.