Email's 'new' label is absolutely positioned to the LEFT of the '+'
icon, which works there because the '+' is the visible/clickable
anchor. The chats manage button has no visible glyph at rest, so the
label was rendered outside the button's bounding box — hovering
'manage' lost the :hover state and clicking it missed.
Override list-item-plus-label inside chats-manage-btn:
position: static (in flex flow) + max-width:0 / max-width:80px
expand-on-hover so the button's clickable rect grows alongside the
text. Hover stays sticky; click hits.
94931ba59f