fix issues and awesome improvements in meshc functionality

[gilbertogalvis]

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

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

[X,Y] = meshgrid(-5:.5:5);
Z = Y.*sin(X) - X.*cos(Y);
sc = meshc(X,Y,Z);

fig2plotly(gcf, 'offline', true,  'TreatAs', 'meshc');

Screenshots of results are shown bellow

Links to Chart-Studio bellow

https://chart-studio.plotly.com/~galvisgilberto/4426/#/
https://chart-studio.plotly.com/~galvisgilberto/4428/#/
https://chart-studio.plotly.com/~galvisgilberto/4430/#/
https://chart-studio.plotly.com/~galvisgilberto/4432/#/
https://chart-studio.plotly.com/~galvisgilberto/4438/#/
https://chart-studio.plotly.com/~galvisgilberto/4440/#/