UV mapping: Some new stuff

[micheus]

I have been implementing some new options for the UVmapping tools in Wings3D, by considering some suggestions we have received and that seems to improve our workflow.
Let's hope they can be approved and added to the further version.


AutoUV Segmenting

• Added RMB option to the Projection Camera in the UV Segmentation;
  This can be particularly useful for text-based texturing.
  

* Left is the regular LMB option and Right is the new RMB option.

• Added option to show textured charts using AutoUVChart colors;
  It was suggested at Discord the possibility to use colors (AutoUVCharts) instead of see the textures when we need to re-segment the meshes in AutoUV Segmenting window.
  

AutoUV Editor

• Added a prompt to ask user about UV mapping operations;
  It has been reported by users who often work with many combined objects that, when separating them, they accidentally call the Segmenting or AutoUV editor with all of them selected, which causes some trouble.
  

• Added an option to AutoUV to arrange charts horizontally or vertically;
  It also includes sub-options to keep or arrange the charts left/center/right or
  top/center/bottom related to the selection bounding box.
  This is a handy option to help us manually pack the UVs.
  

[micheus]

Another useful option is for cases where we need to remap a portion of an already unwrapped object, or when someone unwraps a composite object in parts. In these situations, we want the new charts to remain consistent in scale with the previously unwrapped ones. To achieve this, we simply select one of them as a reference.