Fix T71154: EEVEE Soft Shadows Viewport Rendering

EEVEE Soft shadows were not rendered correctly during viewport
rendering. The reason for this is that during viewport rendering the
shadow buffers were only update once and not per sample. This resulted
that all the samples calculated the same shadow.

This fix moves the call to `EEVEE_shadows_update` from cache finished to
draw scene. This needs to happen before `EEVEE_lightprobes_refresh`.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D6538

Fix T72905: EEVEE + UV Edit Unused Map

There is a cornercase when the user edits an uvmap, that is not part of
the material (yet). When this is the case the uvmap was not added to the
uv buffer and the 'pos' alias was not created.

This change will always request the active uv map when uv editing.

Reviewed By: fclem

Differential Revision: https://developer.blender.org/D6534

Fix T72200: Split Quad View Region Crash

When splitting a Quad View by dragging a corner an quad area can become
negative size because of a one pixel offset to calculate the start of
the area.

This patch solves this to make sure that there are no negative areas. By
adapting the `ARegion.winrct`.

Reviewed By: Severin

Differential Revision: https://developer.blender.org/D6579

Fix T72063: Workbench Sculpt Render

When sculpting and doing a image render the workbench used the sculpt
batch what is created by a different GPU context and would not show up.

In debug builds an assert for this case is checked. I rechecked all
`use_sculpt_pbvh` that it also checked if it was rendering. Only the
workbench deferred didn't do this for the default render mode.

With this change the user can render a workbench render directly from
sculpt mode.

Fix T67305: Sculptmode Wireframe Coloring

When in sculptmode the wireframe coloring should always be disabled.
When an object was sculpted but had modifiers this was not detected and
the colors were still shown.

This fix will disable wireframe coloring for any object that is in
sculptmode.

Fix T72250: Select Boundary Loop

Edge Index display were not showing up after performing
"Select Boundary Loops" when in face selection mode. The operation
tagged the mesh that the selection was changed, but in the end this
didn't do anything within the depsgraph.

The fix changes this to recalc the geometry of the object. What also
syncs the selectmode flags. A better solution would be to update the
select flags only. But that could be done as future work when we have a
performance problems.

Fix T73069: Studiolights

Studiolights that were just created didn't had the
`STUDIOLIGHT_SPECULAR_HIGHLIGHT_PASS` flag. Without this flag the
studiolight the viewport didn't show the specular highlights and it
wasn't possible to switch the highlights on/off in the popover. After
reloading the studio lights this was possible.

This patch will always set the flag for any newly created, or being
edited studiolight, so the workbench render engine is fed with the right
data.

Fix T71491: Sculpt Brush Text Color

When text drawing is disabled in the viewport the color of the sculpt
brh is set to the last used one. In th Light theme this is black what
makes it totally not visible.

This change will render the brush text using `TEXT_HI` as this is the
last one set when the text overlay is on.

Fix T72902: Whiskey Lake support

Users reported that Whiskey lake has the same issue as other intel
platforms where an extra glFlush is needed. This change will
add Whiskey Lake to that exception.

Patch provided by Philip Luk

Fix T72788: Crash Edit Custom Bone Object

In a recent refactor we splitted the lines extractor in `extract_lines` and
`extract_lines_loose`. When an object is in edit mode the extracted
lines loose also had to include a dummy bmesh edge iterator. This change
adds this missing dummy method.

Reviewed By: antoniov

Differential Revision: https://developer.blender.org/D6499