How to get rid of the annoying Yellow triangle?

[silvertouring]

How can I get rid of the annoying Yellow triangle with exclamation mark?
I've posted a screenshot.

[In Omnibus]

Typically that means you have posts that are either waiting to be moderated or have been moderated.

[silvertouring]

Where can I see them?

[shimei]

In additional_css:

.vb-icon-warning-orange {
    background-position: -288px -240px;
    width: 16px;
    height: 15px;
    display: none;
}

[Replicant]

I had some of those on my forum. It was posts that had been soft deleted. After the permanent delete, the triangle disappeared.

[silvertouring]

Originally Posted by shimei

In additional_css:

.vb-icon-warning-orange {
    background-position: -288px -240px;
    width: 16px;
    height: 15px;
    display: none;
}

where can I find additional_css?
sorry new to this.

--------------- Added [DATE]1465978764[/DATE] at [TIME]1465978764[/TIME] ---------------

Originally Posted by Replicant

I had some of those on my forum. It was posts that had been soft deleted. After the permanent delete, the triangle disappeared.

that's my problem as well, but I can't figure out how to permanently remove soft deleted stuff.
Any help?
Thanks