Menu widgets pop-up causing pillarboxing

Description

The menu widgets pop-up for retroachievement leaderboards can cause a pillarboxing effect (reverse letterboxing) that will blackout the left and right sides of the screen flanking the notification text and obscuring all parts of the screen that are not directly above or below the notification. The effect will remain until the game is reset or another leaderboard pop-up occurs.

Prior to bug

During bug

Steps to reproduce the bug

1. Enable menu widgets: settings>onscreen display>onscreen notifications>graphics widgets on
2. Enable achievements, hardcore mode, leaderboards.
3. Load a game with leaderboards. I recommend Pac-Man for Atari 2600 MD5 - 6e372f076fb9586aff416144f5cfe1cb as you can quickly trigger leaderboard pop-ups by pressing start once the game starts.

Bisect Results

This issue seems to have started with the implementation of menu widgets. I've personally experienced the behavior on 1.8.1+ and I've seen it happen across a variety of cores.

Version/Commit

• RetroArch: 1.8.5

Environment information

• OS: Retropie 4.6 (raspbian buster)

Start by reproducing the issue with menu widgets, achievements, hardcore mode, and leaderboards enabled, using the Pac-Man Atari 2600 example and the stated RetroArch version. Trace the menu-widget notification rendering introduced around 1.8.1; done means leaderboard pop-ups no longer pillarbox or black out the sides of the screen, including across cores.