+ fix issue #9, add a customize menu to select ship size color, track size
+ fix issue #10, add menu "toolbar" to display toolbar icons. Notes that in R2018b, tools such as the zoom, pan, datatip, etc are no longer at the toolbar at the top of the figure window. These buttons are now in an "axes" toolbar and only appear when you hover your mouse over the plot. See: <https://fr.mathworks.com/matlabcentral/answers/419036-what-happened-to-the-figure-toolbar-in-r2018b-why-is-it-an-axes-toolbar-how-can-i-put-the-buttons>
