created an attachment (id=168078)
screenshot

description:
the expression build icon is not recognizable under high contrast mode in chart builder.

build number:
2.6.0.v20100512-0630

steps to reproduce:
1. activate the highcontrast function using the keyboard shortcut
(left-alt+left-shift+printscreen).
2. new a pie chart, go to format chart->value (y) series, check the icon of expression builder.


expected result:
please refer the icons used in select data tab.

actual result:
the icons are not recognizable.

error log:
n/a
need to update icons.
fixed. updated the icons
already updated by xingsheng
verified in build (2.6.0.v20100520-0630), closed.