Blender Git Loki

Fix: Ensure that summary channel is enabled when creating timeline

Graph Editor: Changing the display mode to "Drivers" mode now runs the Drivers-Editor UI setup code

This is a step towards being able to just choose the "Drivers Editor"
from the editor selector, and have everything displayed, ready to use.

Currently there are a few problems to resolve still:
1) This update callback doesn't run when changing the mode via the
editors selector in the UI. (Note: This problem also affects the
Timeline vs Dopesheet, causing a lot of initialisation work to be
skipped)

2) There's some missing redraw/refresh here to cause the properties
region to actually show. You need to resize the window for that to
happen now.

Cleanup: Move logic for initialising a new Drivers editor into its own function

This shouldn't really be part of the windowmanager code. Pulling it out
now, so that we can reuse in RNA when switching display modes,
(and perhaps other places later)

Remove debug prints

Fix: Incorrect submodes being set in Dopesheet/Action Editor when changing modes

This commit fixes a number of problematic corner cases when switching between
editors after 2b5050a4cdfbb075d360fd39433acea07432c60b

The root cause of these issues was that mode_prev was not being set in
many cases, resulting in mode changes to the Timeline and back (via other
editors) causing Dopesheet Editors to reset back to "Action Editor" mode.

1) Creating new Dopesheet Editors (e.g. change the default 3D view to
a Dopesheet editor) would default to displaying the "Action Editor",
since mode/mode_prev == 0 represents the "Action Editor" (for backwards
compatability reasons), while mode == 3 is for the "Dopesheet"

2) If you set the Dopesheet Editor to another mode (e.g. "Grease Pencil" mode),
change to another editor (e.g. Shaders), then come back, the mode would
get reset to "Action Editor".

UI: Use Collection icon for New Collection in Outliner

Also temporarily bring back the toggle to search, since it's off by default.

UI: button to create new collection in the Outliner

Expose search like in 2.7, we could make it pop on Ctrl+F to save space if needed.
Align Filter and the less used View menu to the right.

Based on mockups and feedback session with William

UI: Icons for Outliner display modes

We need a better icon for Orphan Data

UI: adjust menu triangle

Was not centered for single icon buttons.

UI: rename "NLA Editor" -> "Nonlinear Animation"

See: T54744

UI: expose Timeline as a space type

See: T54744

Merge branch 'blender2.8' into soc-2018-bevel

UI: expose Driver as a space type

See: T54744

Silence warning in greasepencil-object branch

We don't have warnings in 2.8 because of include order.
But headers shouldn't depend on that for warnings, really.

Cleanup: pep8, single quotes for enums

Despgraph: don't tag for transform/geometry update on relations rebuild.

This should already be happening elsewhere and was causing depsgraph
rebuild to be slower than it should.

Depsgraph: add some missing depsgraph tags when relations change.

Fix outliner mixed collection/object visibility drag toggle not working.

Fix hide object operator to do nothing if no object is selected.

UI: Style locks in Object Transform panel