different syntax between mouse and cursor mode to specify all keys

[pascalpoitras]

Feature description

to match every keys in mouse mode you do something like that

/key bindctxt mouse @item(time):* /print -core mouse

so you use the *. In cursor mode, you can't use * since it match only the litteral * which is the right thing to do because otherwise you would not be able to only match the *. In cursor mode, to match everything you just omit the key

/key bindctxt cursor @item(time): /print -core cursor

The way you do that (omitting the key) is not documented and is not even valid according to @flashcode . Still it's very useful it's the only way to match all keys.

Also, omitting the key doesn't work in mouse mode. So I wonder if it would be possible to

1. make @item(time): equivalent to @item(time):* in mouse mode for consistency
2. precise this syntax in the doc