Dim (SGR) effect can produce unexpected visuals

[pedromfedricci]

The dim (SGR) effect is only cleared when bold effect is also cleared, which can produce some unexpected visuals. Take for example a cli tool that manages it's own vertical and floating views (like a term text editor). If the dim effect is applied to text in the left sided view, right sided views' text that is at the same height is also affected, even though they are separated text views.

I've tested with both alacritty and kitty, and indeed the overextended effect only occurs when the tool is used inside a zellij term.

The attached video showcases the unexpected visual effect.

Information:
Linux
Zellij: 0.31.4
Alacritty: 0.10.1-rc1
Kitty: 0.21.2
Helix: 22.08.1

dim-effect-issue.mp4