UI: Do not shade alpha when blending colors

UI_GetThemeColorBlendShade4fv incorrectly changing alpha by the amount
of the shading offset.

See D9944 for more details.

Differential Revision: https://developer.blender.org/D9944

Reviewed by Hans Goudey

UI: Do not shade alpha when blending colors

UI_GetThemeColorBlendShade4fv incorrectly changing alpha by the amount
of the shading offset.

See D9944 for more details.

Differential Revision: https://developer.blender.org/D9944

Reviewed by Hans Goudey

UI: Fix padding of version label in splash screen

Differential Revision: D13018

Fix T65532: can't assign a key on Italian apple keyboards.

Apple's international keyboards have an additional `kVK_ISO_Section`
key. With some (Italian, Spanish) keyboard layouts, this is ``, `[` keys
which Blender keymap can use.

Right now this key is explicitly set as `Unknown`.

Note that `kVK_ANSI_Grave` is located in a different location.

Differential Revision: https://developer.blender.org/D12905

UI: Change Usages of 'WPaint' to 'Weight Paint'

Changing to a more informative 'Weight Paint' rather than 'WPaint'.

Differential Revision: https://developer.blender.org/D9905

Reviewed by Julian Eisel

UI: Use unified format for "Warning" in descriptions

Warnings in tooltips were using inconsistent formatting, some in
parantheses, some not, some in caps, others not, some on new lines,
some not, etc.

This patch uses a consistent new line and no capitals for these cases.

Differential Revision: https://developer.blender.org/D9904

UI: Clean up "Dupli" to "Instance"

Following the naming conventions defined in T56648, where in this
instance there were still a few remaining uses of the old term.

Differential Revision: https://developer.blender.org/D9817

UI: Clean up use of the term "Metaballs"

Clear the weird term "Metaelement".
These are the metaballs (elements) inside one metaball objects.
- "Meta Ball" to "Metaball"
- "Metaelement", "Meta element" to "Metaball element"

Differential Revision: https://developer.blender.org/D9910

UI: Cleanup and fix labels and descriptions in various places

Changes include using proper and consistent grammar, simplifying
phrasing, using correct terminology, and not including python API
identifiers in tooltips.

Differential Revision: https://developer.blender.org/D9924

UI: Remove colons from some labels

The colons are not necessary in these situations because it's clear
that the label applies to the next group of buttons anyway, and they
add unecessary visual complexity. Committing as part of D9924.