Took me some time to find out, why this doesnt work in the console:

t = term.options.theme
t.background = '#000000'
term.options.theme = t  // no change at all
t2 = {...t}
term.options.theme = t2  // works

Its kinda the old mutual vs immutable issue, and I wonder if we should fix it. Possible ways to deal with it:

• some doc notes stating that the theme object has to change identity to take effect
• or do the {...theme} always in the setter (thus forcing the terminal to re-eval the object), imho most straight forward solution, as this is a rare action not hurting performance