Increase max-height of tiny_select_area from 200px to 300px

- Increased the maximum height limit from 200px to 300px
- This allows more gap options to be visible before scrolling is required
- Maintains the existing scrollbar functionality with overflow-y: auto
- Improves usability by showing more content without immediately requiring scrolling

Author: marcusgreen

styles.css

@@ -68,7 +68,7 @@ Visual feedback for gap select area
     padding: 10px;
     background-color: #f9f9f9;
     min-height: 100px;
-    max-height: 200px;
+    max-height: 300px;
     overflow-y: auto;
     overflow-x: hidden;
 }