Blender Git Loki

Undo: make id-map use binary search to keep sorted

Fix own error w/ undo ID lookup

Was testing with small number of items, so this went unnoticed.

Draw Manager: Improve description of `draw_frustum_boundbox_calc` variables

Cleanup: rename BMesh count_ex -> count_at_most

Cleanup: rename list count_ex -> count_at_most

Undo: use with_prev verisons of id-map lookups

Undo: use general id-map for image undo lookups.

Was doing own name based lookups to keep compatible w/ global undo.

Undo System: id-map avoid duplicate add/lookup

Add versions of add/lookup that check the previous item.

Fix mistake logging w/ undo

Merge branch 'master' into blender2.8

Fix T54477: Broken utf8 strings in old .blend files

Back in the days (2.4x and before), it was rather easy to get some
invalid utf-8 strings in Blender. This is totally breaking modern code,
so this commit adds a simple 'check & fix strings' operator, available
from the main File menu.

Fix (unreported) crash when accessing some bl_rna.properties.

E.g. typing `bpy.data.bl_rna.properties[8].<tab>` in console would hard-crash
trying to dereference NULL pointer. Was a missing check in rna_Property_tags_itemf().

Cleanup: remove unused mtexpoly array

Not needed in 2.8

Merge branch 'master' into blender2.8

Fix duplicate Cycles panels in properties editor.

Fix crash on startup on macOS, after recent framebuffer refactoring.

Undo: remove particle undo push

Was only called on copy particle system
which is already doing an undo push.

Cleanup: editor BKE_main includes

Undo: replace global access w/ ED_undo_stack_get

While I'd like to avoid using this too much since the operator
system should handle.
It's less trouble than accessing it inline each time.

Fix mode switching error on undo

For 2.8 there is already a utility function for this,
wrap it - avoiding an undo step.