Visual/separation problems when using plotmatrix()

[xarico10]

When using plotmatrix() to create a matrix of subaxes containing scatter plots of the columns of X against the columns of Y, there's no separation within each scatter plot and all of them are being plotted in the same grid. Also, as LineSpec parameter isn't working to change de color (#187), there's no way of forcing all scatter plots to have the same marker color.

rng(1)
X = randn(50,3);
Y = reshape(1:150,50,3);  
plotmatrix(X,Y)

fig2plotly(); 

Expected and generated (https://chart-studio.plotly.com/~xarico10/521/#/) plot:

Examples on using plotmatrix() can be found on:
https://www.mathworks.com/help/matlab/ref/plotmatrix.html#responsive_offcanvas