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When 'protect ROM sprites' is turned off, and a theme is being loaded (after the desktop has started in order to pick the right eigen factor sprites file), the various built in ROM applications have already installed their iconbar sprites.
Therefore, when new ones are loaded the bounding boxes are wrong (eg. drive icons the wrong width, switcher icon too tall) and need recalculating.
Derived from 'FontChange' new configure helper 'IconChange' does this.

Also removed unnecessary 500/Tools22.

Version 1.00. Tagged as 'Boot-1_00'