[Suggestion] preserve uv function

[wtskoo]

Detailed description of your suggestion

Hello Blockbench team
I am a 3D artist recently starting using blockbench for our new project, I tried most low poly modeling software on the internet, and i feel this program is most elegant, powerful, and easiest. Thanks for developing this awesome program.

I also have a suggestion, that I hope the uv editor has a "preserve uv" function, that i can move vert without messing up textures, can be very helpful and speed things up. it will be a awesome tool to have! Please consider it!

ref
https://help.autodesk.com/view/MAYAUL/2022/ENU/?guid=GUID-9922A396-77C0-4EEB-9A8A-B301720C5802