Version 4.0 Patchlevel 16 Added Features/Bug Fixes

1. Fix a bug with Tgif.RubberBandColor that it leaves ghost images during editing text objects when one moves the text cursor with cursor keys. Thanks to Shinichiro Shiratake <shinichiro.shiratake@toshiba.co.jp> for pointing out the problems.

2. Rename SetTextBackgroundColor() in the Text Submenu of the Edit Menu to SetTextFillPatternColor() since this operation only changes the fill pattern color of a text object and not the background color. Also, since text doesn't reallly have a background color (but only has a fill pattern color), the fix to set the default background color in 4.0 patchlevel 15 is invalid. Now the current color is used as the fill pattern color for new text objects. Thanks to Shinichiro Shiratake <shinichiro.shiratake@toshiba.co.jp> for pointing out the problems.