Support for adding/removing panels or show/hide panels inside p-splitter

[masum-mollik-rocketml]

It is not possible to add/remove a panel to/from the p-splitter. Can we add functionalities to support that. angular-split functionalities can be followed.

[cagataycivici]

We're working on a DockLayout component to have these features, it will be an advanced version of Splitter.