* NEW: Remove two ugly backgrounds.
* BUG: Don't crash if the selected background is not available anymore.
[GB.FORM]
* NEW: ColorPalette.ReadOnly is a new property to prevent the palette
contents to be modified.
* NEW: ColorPalette.AddFirst() is a new method that adds a color to the
beginning of the palette.
* NEW: ColorPalette now has a popup menu to remove or sort colors.
* NEW: ColorPalette.Index is a new property to define or get the index of
the current color. The current color is drawn with a big black border.
* NEW: ColorPalette.Current is a new property to define or set the current
color.
* NEW: ColorChooser now uses a ColorPalette.
git-svn-id: svn://localhost/gambas/trunk@6863 867c0c6c-44f3-4631-809d-bfa615b0a4ec
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