Fix T91873: Crash when opening properties panel

This patch fixes a crash that was recently introduced by rB5cebcb415e76.
The reason were missing poll functions in the UI and operator.

Reviewed By: ISS

Maniphest Tasks: T91873

Differential Revision: https://developer.blender.org/D12736

VSE: Add color tags to strips

This patch adds color tags to VSE strips, an overlay option to toggle the colors
on and off, a section in the theme settings to define the 9 possible colors and
two ways of changing the color tag through the UI. You can change the color
through the right-click context menu, or in the strip side panel next to the
strip name.

Color tags are defined in user preferences and they can be disabled in overlay
settings.

Reviewed By: campbellbarton, ISS

Differential Revision: https://developer.blender.org/D12405

Fix T84638: Wrong scale for primitives with radius

Creating some primitives allows for a scale value (via python) that will
scale the object accordingly. For objects with a radius parameter
(like cylinders, spheres, etc.) passing a scale different to (1,1,1)
would result in unexpected behavior.

For example:
`>>> bpy.ops.mesh.primitive_uv_sphere_add(radius=2, scale=(1,1,2))`
We would expect this to create a sphere with a radius of 2
(dimensions 4,4,4) and then be scaled *2 along the z-axis
(dimensions 4,4,8). But this would previously create a scaled sphere
with dimensions (2,2,4).

The scale was simply divided by two. Maybe because the "radius"
parameter for creating the primitives was confusingly named "diameter"
(but used as the radius).

The fix adds a scale parameter to `ED_object_new_primitive_matrix`
and also renames the wrongly named "diameter" parameters to "radius".

Reviewed By: campbellbarton

Maniphest Tasks: T84638

Ref D10093

UI: Add light count to viewport statistics

Even though lights were part of `SceneStats`, they were not used when
rBfd10ac9acaa0 was committed.

This patch adds the light count back into the statistics. When a light is
the active object, it will display the total number of lights in the
scene, as well as how many lights are currently selected.

{F10141354}

Reviewed By: #user_interface, Severin, Blendify, harley

Maniphest Tasks: T88512

Differential Revision: https://developer.blender.org/D11387

VSE: Add tooltips for add_effect_strips operator

This patch adds propper tooltips to the effect strips in the "Add" menu.
Note that not all effect strips are actually in the "Effect Strips"
submenu like color strips, text strips or transitions. For these types
of effect strips, a dediacted tooltip is especially useful.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D11714

Fix T89952: GPencil channel box selection offset

The channel box selection was offset for grease pencil layers.

This is a proposed fix by @yann-lty

Before:
{F10227973}

After:
{F10227974}

Reviewed By: #grease_pencil, antoniov

Maniphest Tasks: T89952

Differential Revision: https://developer.blender.org/D11962

Fix T89952: GPencil channel box selection offset

The channel box selection was offset for grease pencil layers.

This is a proposed fix by @yann-lty

Before:
{F10227973}

After:
{F10227974}

Reviewed By: #grease_pencil, antoniov

Maniphest Tasks: T89952

Differential Revision: https://developer.blender.org/D11962

VSE: Add tooltips for add_effect_strips operator

This patch adds propper tooltips to the effect strips in the "Add" menu.
Note that not all effect strips are actually in the "Effect Strips"
submenu like color strips, text strips or transitions. For these types
of effect strips, a dediacted tooltip is especially useful.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D11714

Merge branch 'master' into temp-gpencil-bezier-stroke-type

Fix T89265: Crash when tabbing through num inputs

Fix by reverting the part of ec30cf0b742f5181c4de91b474ca01d6a809c593
that assigned `but->editval` in `ui_numedit_begin_set_values`.

Causing access freed memory when using tab to switch
to a numeric input and then leaving the textbox by clicking outside.
This was because `ui_numedit_begin_set_values` shouldn't need to set
`but->editval` and overwrite the pointer.
This would set a pointer that had previously been freed,
causing a `NULL` check to fail later on.

Ref D11679