fix: stop click propagation on attribute modal option selection

Clicking an option in the Select Attribute modal was bubbling up
to the parent BrowserWindow div's handleClick handler, which could
re-trigger element selection logic and require a second click to
actually close the modal.

Adding e.stopPropagation() to the button's onClick prevents the
event from reaching the parent handler.

Fixes #623

Author: smeetagrawal23-sys

src/components/browser/BrowserWindow.tsx

@@ -1647,7 +1647,8 @@ export const BrowserWindow = () => {
                     variant="outlined"
                     size="medium"
                     key={option.value}
-                    onClick={() => {
+                    onClick={(e) => {
+                      e.stopPropagation();
                       handleAttributeSelection(option.value);
                     }}
                     style={{