Blender Git Loki

Fix: Pack islands to area operator

* Correct packing area coordinates for cases when user sets the maximum
coordinates to be lower than the minimum coordinates
* Cancel operator when scale option is disabled and packing area is not
big enough for selected islands. Also display warning message in UI
when this happens

Merge branch 'master' into soc-2021-uv-editor-improvements

Change the max limit for Dynamic grid

The max limit for dynamic grid was set at 12. This commit changes that
to 5000

Minor Cleanup

* Remove printf statements
* Use enums

Merge branch 'master' into soc-2021-uv-editor-improvements

UV: Replace default grid with subdividing grid

Replaces the default static grid with a dynamically subdividing grid.
This means that zooming in the UV editor will add more divisions to
the grid and vice versa when zooming out.

UV: Dynamic Grid

Adds the option to replace the default grid in the UV editor with a NxN
grid.

Refer T78389

Merge branch 'master' into soc-2021-uv-editor-improvements

UV: Display packing area coordinates

Adds properties for displaying packing area coordinates in the pack
islands to area operator.
Also fixes the issue of modified packing coordinates when the user zooms
in/out in the editor before redoing the operator from the properties
panel in UI.

Fix: Release memory before cancelling operator

Cleanup : UV pack operators

* Remove printf statements
* Use float constants instead of double
* Cleanup comments
* enum to make code better readable

Merge branch 'master' into soc-2021-uv-editor-improvements

UV : Pack islands to box area

Adds a new operator to the UV editor - Pack islands to area
Allows the users to pack selected UV islands to a specified
area in the UV editor

Refer T78398

Merge branch 'master' into soc-2021-uv-editor-improvements

Merge branch 'master' into soc-2021-uv-editor-improvements

Minor fix : Correct calculation of nearest UDIM

Corrects the logic for calculating the distance between selected UVs and
UDIM tiles

UV : Pack islands to correct/specified UDIM

Adds 2 features to the pack islands operator

* Packing selected UVs to the closest UDIM
* Packing selected UVs to user specified UDIM

Merge branch 'master' into soc-2021-uv-editor-improvements

Merge branch 'master' into soc-2021-uv-editor-improvements

Test commit. Add missing tooltips for pivot options in UV Editor.