fix vertical distance between textbox only rows

src/gui/css/options.css

@@ -74,6 +74,7 @@ div.options-group input {
     border: 2px solid var(--button-border-color);
     min-width: unset; /* remove SC styling */
     width: 140px;
+    margin: 4px 0;
 }
 
 div.options-group input.number {