Don't open the regular browser or our context menu on right-clicking the Options button in the message action bar

src/components/views/messages/MessageActionBar.tsx

@@ -76,6 +76,17 @@ const OptionsButton: React.FC<IOptionsButtonProps> = ({
         onFocusChange(menuDisplayed);
     }, [onFocusChange, menuDisplayed]);
 
+    const onOptionsClick = (e: React.MouseEvent): void => {
+        // Don't open the regular browser or our context menu on right-click
+        e.preventDefault();
+        e.stopPropagation();
+        openMenu();
+        // when the context menu is opened directly, e.g. via mouse click, the onFocus handler which tracks
+        // the element that is currently focused is skipped. So we want to call onFocus manually to keep the
+        // position in the page even when someone is clicking around.
+        onFocus();
+    };
+
     let contextMenu: ReactElement | null;
     if (menuDisplayed) {
         const tile = getTile && getTile();
@@ -97,13 +108,7 @@ const OptionsButton: React.FC<IOptionsButtonProps> = ({
         <ContextMenuTooltipButton
             className="mx_MessageActionBar_maskButton mx_MessageActionBar_optionsButton"
             title={_t("Options")}
-            onClick={() => {
-                openMenu();
-                // when the context menu is opened directly, e.g. via mouse click, the onFocus handler which tracks
-                // the element that is currently focused is skipped. So we want to call onFocus manually to keep the
-                // position in the page even when someone is clicking around.
-                onFocus();
-            }}
+            onClick={onOptionsClick}
             isExpanded={menuDisplayed}
             inputRef={ref}
             onFocus={onFocus}