Blender Git Loki

Eevee: Start Implementation of Cascaded Shadow Maps

Eevee: Do shadow cube render in one pass.

Draw Manager: Fix Gradient Background

Correct error drawing curve normals

Merge branch 'master' into blender2.8

Disabled a unittest, to be re-enabled when T51261 is fixed.

# Conflicts:
# source/blender/alembic/intern/alembic_capi.cc

Gawain: fix immediate mode drawing exceeding IMM_BUFFER_SIZE

Would cause crazy colors in file selector.

Alembic import: select imported objects

When the Alembic import is finished, all imported objects are selected.

Fix debug checks were enabled for release builds only

NDEBUG meanse Not DEBUG.

Fix T51215: depsgraph evaluation of collection properties (overrides)

IDProperty: New util function to merge groups recursively

Corrections for layers unittest based on design change

Example, imagine an object Cube in collections 1 and 2 where both
collections are nested to A. Now we set a "color" property as follow:

```
Scene -> GREEN
--
A -> RED
? 1 -> BLUE
? 2 -> -
```

In this case the object will be RED, because of A? 2.

Now if we have:

```
Scene -> GREEN
--
A -> RED
? 1 -> -
? 2 -> PINK
1 -> -
--

The object will be PINK because of A? 2.

Note that the (top level) collection 1 doesn't influence the object color
because there are no overrides on it. The scene render settings (GREEN
in this case) are only used as fallback if an override is not set at
all.

Cleanup: Use explicit unsigned int type

This is as per our code style states ans as majority of the team
prefers types to be used.

Use reflect for calculating second normal

Fix T51198: Crash with new Datablock ID Properties

Merge branch 'master' into 28

Use reflect for calculating second normal

Docs: move note (was mixed up)

Cleanup: remove type prefix from render-data vars

Render data is never mixed with other object types,
no need to make a distinction.

Fix T51248: user preferences window size not adapted to DPI.

Fix merge of master (no more base...).