This reverts commit a2a9324b1e.

* Fix documentation website link

* Update docs

* navBarButtonColor was not applied to custom initial left button
* Dynamic custom button didn’t work
* Setting default icon (like menu or back button) after a custom icon was used didn’t work

Change bottom tab bar button image at runtime

Add setSubTitle implementation for iOS + docs

Fix dead link

Create BitmapDrawable using a constructor that actually uses the Resources reference

Some navBar button properties were marked as common by mistake.