WM: Add 'Confirm On Release' option for WM_OT_radial_control

Adds a new property called "Confirm On Release" that does what it says,
confirm the action without having to do left-click or to press any other
extra-key which concludes in a more dynamic and efficient way of changing
brush size or strength for example, especially for tablet users.

Reviewed By: campbellbarton

Ref D10233

WM: Add 'Confirm On Release' option for WM_OT_radial_control

Adds a new property called "Confirm On Release" that does what it says,
confirm the action without having to do left-click or to press any other
extra-key which concludes in a more dynamic and efficient way of changing
brush size or strength for example, especially for tablet users.

Reviewed By: campbellbarton

Ref D10233

TEXTURE PAINT: Tools with wrong cursor

Texture paint tools were using DEFAULT cursor instead of PAINT_CROSS cursor as vertex paint, weight paint and sculpt modes.

Before
{F9591366}

After
{F9591370}

Reviewed By: Blendify

Differential Revision: https://developer.blender.org/D10172

TEXTURE PAINT: Tools with wrong cursor

Texture paint tools were using DEFAULT cursor instead of PAINT_CROSS cursor as vertex paint, weight paint and sculpt modes.

Before
{F9591366}

After
{F9591370}

Reviewed By: Blendify

Differential Revision: https://developer.blender.org/D10172

UI: Use Eyedropper Cursor with Sample Weight Tool

While using the Sample Weight tool in Weight Paint mode, user eyedropper mouse cursor.

Differential Revision: https://developer.blender.org/D9431

Reviewed by Pablo Vazquez

UI: Show Weight Value with Sample Weight Tool

While using the Sample Weight tool in Weight Paint mode, show weight value in tool header.

Differential Revision: https://developer.blender.org/D9432

Reviewed by Pablo Vazquez

UI: Show more information in open file tooltip

This shows the file's full path, its modification date, and its size in
the tooltips for the open recent fiels menu. When no file path is set,
the original operator description is used.

Differential Revision: https://developer.blender.org/D9028

Annotations: Add Stabilization for draw tool

This patch adds the stabilizer feature of GP to the annotations.

It has a toggle to activate it "Use Stabilizer", and two properties to control the behaviour of the smooth effect (factor and radius).
You can also use shift at start or in the air to temporaly use this feature.

{F8518283}

Differential Revision: https://developer.blender.org/D7648

Annotations: Add different arrow styles for line tool

This patch adds different kind of shapes/styles for the line extremes while using the annotation line tool.

Current Styles: (following @mendio mockup)
- Arrow (closed arrow)
- Open Arrow
- Segment
- Square
For future it would be great to have icons, it would be more intuitive (and less space) with previews of what each end / start of line does, like the google slides one as reference:

{F8511116}

Reviewed By: #grease_pencil, antoniov, HooglyBoogly

Differential Revision: https://developer.blender.org/D7608