This PR fix issues and do awesome improvements with fmesh functionality. fmesh previous version was very poor. This new version is really awesome. This PR was tested for all examples in https://github.com/plotly/ssim_baselines/tree/main/matlab/code-examples/surface-and-mesh-plots/fmesh

It is very important to highlight that to use this new functionality, TreatAs optional parameter must set to fmesh. Example of usage bellow

r = @(s,t) 2 + sin(7.*s + 5.*t);
x = @(s,t) r(s,t).*cos(s).*sin(t);
y = @(s,t) r(s,t).*sin(s).*sin(t);
z = @(s,t) r(s,t).*cos(t);
fmesh(x,y,z,[0 2*pi 0 pi]);

f = fig2plotly(gcf, 'offline', 0, 'TreatAs', 'fmesh');

Screenshots of results are shown bellow

Links to Chart-Studio

https://chart-studio.plotly.com/~galvisgilberto/4238/#/
https://chart-studio.plotly.com/~galvisgilberto/4240/#/
https://chart-studio.plotly.com/~galvisgilberto/4242/#/
https://chart-studio.plotly.com/~galvisgilberto/4244/#/
https://chart-studio.plotly.com/~galvisgilberto/4246/#/
https://chart-studio.plotly.com/~galvisgilberto/4248/#/