Blender Git Loki

Merge branch 'master' into greasepencil-object

Outliner: Refactor show active to show all instances of object

Previously the show active operator opened the tree to show the
first instance of the active object. With collection linking,
the active object could be in multiple collections. This expands
the show active operator to expand all hierarchies that contain
the active object. The view will be centered on the first
active object in the outliner.

Bevel cutoff vertex mesh method: New profile height method.

The height of the transformed profile is calculated when cutoff profiles
are enabled and then used later for the length of the sides of the cutoff
faces in the vertex mesh. The lengths can still be incorrect for more
acute angles between incoming edges, but the solution to that will probably
be related to the solution for the directions of the cutoff face sides.

Outliner: Cleanup item activate code

Removed the recursive operator property as it is no longer needed.

Sculpt: Mesh abstaction API [WIP]

Using this API, all new tools for the sculpt branch should work with
both mesh and bmesh. I also ported mask by normal, mask expand and the
transform operator (with its mesh filter cache) in order to test it

Outliner: Fix small issues in walk navigation

After adding open/close features to walk navigation, a few small
issues appeared. This adds a few more checks to ensure a walk
or expand really occurs when the desired keys are pressed, rather
than expanding when a walk is desired.

Also moved the walking code to separate functions to make the
switch statement more clear to read.

Trivial change in profilewidget template code

Add versioning for custom profile widget in bevel modifier.

ProfileWidget sampling and display:
1. Added the ability to sample fewer segments from the profile path than
the number of control points.
2. Added a display for the sampled segment positions in the widget's display.
This isn't an essential feature, but it helps visualize where the segments
will be sampled while keeping the focus on the widget itself.

This commit also includes various smaller changes:
1. Resolving / deleting various TODO comments without affecting functionality
in each file.
2. Rewording and clarifying comments throughout the code.
3. Renaming variable names for better code readability.

Resolve / delete various small TODOs, edit some comments and tooltips.

No major changes to functionality.

Cloth: intial steps towards preserving original mesh data

Outliner: Improve click and drag for openclose

This adds the ability to click and drag over a disclosure triangle
and immediately drag back over it to close it. Previously it
required opening the next element before closing the first opened
element because of the way the operator stored the previously
toggled disclosure. This makes the operator more easy to use and
understand.

Merge branch 'master' into soc-2019-outliner

Linux: add script and instructions for creating snap packages

We will now maintain the Blender package on snapcraft.io/blender.

Differential Revision: https://developer.blender.org/D5342

Linux: update appdata description

GPencil: Add Edit support to Length modifier

Now the modifier is visible in edit mode.

GPencil: Fix missing modifiers initialization

This was missing when the modifier was ported from NPR branch

GPencil: Cleanup more compiler warnings

USD: Allow user to disable export of UV maps and mesh normals

The UV maps and mesh normals take up a significant amount of space, so
it's better to make them optional. They're still enabled by default,
though.

Comparison: a shot of Spring (03_035_A to be exact) is 1.2 GiB when
exported with UVs and normals, and 262 MiB without. We probably have
room for optimisation of written UVs and normals.

GPencil: Remove compiler warnings