tt-rss/lib/dijit/themes/nihilo/Editor.css

.nihilo .dijitToolbar .dijitToolbarSeparator {
	background: url('../../icons/images/editorIconsEnabled.png'); /* separator in editor icons sprite image - enabled state */
}

/**** ICONS *****/

.nihilo .dijitEditorIcon {
	background-image: url('../../icons/images/editorIconsEnabled.png'); /* editor icons sprite image - enabled state */
	background-repeat: no-repeat;
	width: 18px;
	height: 18px;
	text-align: center;
}
.nihilo .dijitDisabled .dijitEditorIcon {
	background-image: url('../../icons/images/editorIconsDisabled.png'); /* editor icons sprite image - disabled state */
}