Excalidraw: Perfect resizing with shift button is broken for flipped elements

[gmertk]

[dwelle]

Yup, I've mentioned it in the PR that normalizes handles, but forgot to create an issue. Thanks.

@gmertk if you want I can work on it since it was introduced by me. Lemme know.

[gmertk]

@dwelle ah sure I'm assigning to you then. If you can't find time, feel free to pass it back to me. Btw I did some small refactoring for delta values on https://github.com/excalidraw/excalidraw/pull/430 it might be better to build up on that branch.

[gmertk]

Just tested this with all the shapes, flipped, shift pressed, etc. Works great! Thanks @dwelle.