-Prevent landscape collision from checking the DDC when we know we are generating new collision data for the first time.
-Do not recreate landscape collision objects when actor is moved
-Added error messages on tiled landscape import dilaog to explain what is wrong with source data
-Added png format support when importing tiled weighmaps
-Show material instances in tiled landscape import dialog
[CL 2371382 by Jack Porter in Main branch]
#UE4 Added support to drag and drop world assets on the level browser (specifically the level list in SWorldHierarchy) to add them as sublevels.
#codereview Dmitriy.Dyomin
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Integrated using branch Ue4-To-UE4-Fortnite-Simple (reversed) of change#2222841 by Bob.Tellez on 2014/07/17 18:26:40.
[CL 2227532 by Bob Tellez in Main branch]
#TTP 335685 - EDITOR: Level Browser: Allowed to click "move selected actor to level" on an actor that is already in the selected level
#branch UE4
#proj Editor.WorldBrowser
#proj Editor.Levels
#change Added a new method IsValidMoveActorsToLevel to both FLevelCollectionModel and FLevelCollectionViewModel, this is used to enable the Move Actor to level command for both cases. It scans the selected actors and checks their levels against the selected levels. If any actor is contained within any of the selected levels it disables the control. It also disables the control should there be no actors selected. If both of these cases pass it simply checks if the level is editable.
#reviewedby Chris.Wood
[CL 2113869 by Barnabas McManners in Main branch]
Splitted World Browser views into three independent windows, each window can be summoned from a hierarchy view or details view toolbar
World composition can now be toggled through WorldSettings - bEnableWorldComposition. Once enabled persistent level will be treated as a world root. No more '?worldcompistion' parameter workarounds. 'Open World' command was removed, as levels saved with world composition enabled can be open through 'Open Level' command.
Added bEnableWorldOriginRebasing parameter to WorldSettings, which contols whether world origin shifting should be used
[CL 2072584 by Dmitriy Dyomin in Main branch]
- Added material selection to tiled landscape importing tool
- Added tiled weightmap import option for each landscape layer found in selected material
[CL 2052201 by Dmitriy Dyomin in Main branch]
- Added icons to level hierarchy to distinguish level streaming methods
- Added tile coordinates offset when umporting tiled heightmap
[CL 2047641 by Dmitriy Dyomin in Main branch]
