Dashboard: Scan card layout looks bad when threats are found (#15052)

Minor styling adjustment for the "Security -> Scan" dashboard widget.
The problem only appears if there are threats found.
More information and steps on how to reproduce: #14914

_inc/client/at-a-glance/scan.jsx

@@ -96,7 +96,7 @@ class DashScan extends Component {
 				if ( threats !== 0 ) {
 					return renderCard( {
 						content: [
-							<h3>
+							<h3 className="jp-dash-item__title jp-dash-item__title_fullwidth jp-dash-item__title_top">
 								{ __( 'Uh oh, %(number)s threat found.', 'Uh oh, %(number)s threats found.', {
 									count: threats,
 									args: { number: numberFormat( threats ) },

_inc/client/components/dash-item/style.scss

@@ -37,7 +37,7 @@
 	display: inline-block;
 	border: 1px solid $light-gray-700;
 	border-radius: 4px;
-	padding: 0px 4px;
+	padding: 0 4px;
 	min-width: 36px;
 	text-align: center;
 
@@ -50,6 +50,18 @@
 	}
 }
 
+.jp-dash-item__title {
+	max-width: calc( 100% - 18px ); // For the support icon
+
+	&.jp-dash-item__title_fullwidth {
+		flex-basis: 100%;
+	}
+
+	&.jp-dash-item__title_top {
+		margin-top: 0;
+	}
+}
+
 .jp-dash-item__description {
 	margin: 0;
 	font-size: rem( 14px );