Some new docs for fpg_widget.pas unit.
Some new docs for fpg_widget.pas unit.

Important point is the explanation for the Anchors property and
how fpGUI uses it.

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI