[DF-2395] Changes for defect.
[DF-2395] Intermediate changes.
[DF-2395] Inter changes.
[DF-2264] fix review issues
[DF-2512] add correct file filter to landscape dialog
[DF-2516] Fixed building landscape from empty heightmap
[DF-2505] Removed skybox from beast system
[DF-2522] Disabled convertation of skybox to shadow
[DF-2521] Fixed wrong error messages
[DF-2507] Small refactoring
[DF-2507] Fixed Reloading of skybox
[DF-2503] Fix tile mask texture reload
DF-2523 fixed skybox clone to remove TREE_NODE_NEED_UPDATE flag
[DF-2513] fix bug
[DF-2513] add forgotten refactoring
[DF-2395] Final changes.
Merge remote-tracking branch 'origin/development' into DF-2395_UIScrollView_move_controls_with_negative_coordinates
[DF-2496] Fix crashes when disable\enable editors while modifications are in progress.
[DF-2395] Added recalculation of content after loading from yaml.
Merge pull request #236 from dava/DF-2395_UIScrollView_move_controls_with_negative_coordinates

DF-2395 ui scroll view move controls with negative coordinates