fixed: use flex grow strategy for different column sizes

views/default/widget_manager/site.css

@@ -76,34 +76,22 @@
 		flex-basis: 0;
 
 		&.col-width-25 {
-			flex-basis: 25%;
-			min-width: 25%;
-			max-width: 25%;
+			flex-grow: 25;
 		}
 		&.col-width-33 {
-			flex-basis: 33%;
-			min-width: 33%;
-			max-width: 33%;
+			flex-grow: 33;
 		}
 		&.col-width-40 {
-			flex-basis: 40%;
-			min-width: 40%;
-			max-width: 40%;
+			flex-grow: 40;
 		}
 		&.col-width-50 {
-			flex-basis: 50%;
-			min-width: 50%;
-			max-width: 50%;
+			flex-grow: 50;
 		}
 		&.col-width-60 {
-			flex-basis: 60%;
-			min-width: 60%;
-			max-width: 60%;
+			flex-grow: 60;
 		}
 		&.col-width-75 {
-			flex-basis: 75%;
-			min-width: 75%;
-			max-width: 75%;
+			flex-grow: 75;
 		}
 	}
 }