x icons have bad visibility in Infragistics2012 theme.

[norikois]

Description

x icons have bad visibility in Infragistics2012 theme. This issue is similar to https://github.com/IgniteUI/ignite-ui/issues/1863

Steps to reproduce

Open the attached reproducible sample.

[Sort on Multiple dialog]

1. Click the feature choose icon and click "Sort on Multiple"
2. Click one of "Sort by". -> See the "x" icon.

[Move Columns dialog]

1. Click the feature choose icon and click "Move to", then click "Move Columns". -> See the "x" icon at the caption area.

[Add to Group By dialog]

1. Click "select columns" in the group by area.
2. Click one of "Group By". -> See the "x" icon.

[Edit row data dialog]

1. Click one of the data row. -> See the the "x" icon at the caption area.

See also the attached screen shots.

Result

Those "x" have poor visibility.

Expected result

Those "x" have clear visibility.

Attachments

Attach a sample if available, and screenshots, if applicable.
my-sample1.zip