created an attachment (id=160756)
screenshot

description:
the icon for expression builder is not the same as others in "select image" dialogue, and the tooltip for the button is missing.

build number:
2.6.0.v20100303-0630

steps to reproduce:
1. new a chart, go to "format chart" tab.
2. chart area->axis->x-axis->interactivity, select custom for cursor and click "image" button.
3. check the icon for expression builder.

expected result:
1. the icon for expression builder is different from others.
2. the tooltip for the expression builder button is shown.

actual result:
see the screenshot.

error log:
n/a
fixed. update the expression builder's icon and tooltip.
verified in build (2.6.0.v20100318-1009), closed.