[#23008] Wrong numbers in Edge Length

- tooltips didnt say how to get global values.
- save a vector addition per vertex when drawing stats by using mul_mat3_m4_v3() instead of mul_m4_v3()

source/blender/blenlib/intern/math_matrix.c

@@ -309,6 +309,7 @@ void mul_v3_m4v3(float *in, float mat[][4], float *vec)
 	in[2]= x*mat[0][2] + y*mat[1][2] + mat[2][2]*vec[2] + mat[3][2];
 }
 
+/* same as mul_m4_v3() but doesnt apply translation component */
 void mul_mat3_m4_v3(float mat[][4], float *vec)
 {
 	float x,y;