Panel maxSize

[PGMaster]

I am working on an app which requires 3 panes. But the two panes at the end should not expand after a particular limit. It would be good to have maxSize to be set for each pane.

[DanFessler]

I agree that should be added. in the meanwhile though you could potentially set a minSize on the left-most panel which would effectively limit how far the other two panels could be expanded.

[pdfowler]

@DanFessler I've just submitted a PR with maxWidth functionality. I was really happy to see a multi-panel project that didn't require me to nest in groups of Two. However, maxWidth is a core requirement for us, and I figured it would help the project.

I also broke apart your modules - helps when looking at new code to know where each property/callback/function lives. 😇

LMK what you think. Cheers!

[DanFessler]

@pdfowler left some comments/questions for you on the PR

[DanFessler]

resolved in #27