Admin bar shortlink input is missing left padding

[duck_]

The #wpadminbar .shortlink-input left/right padding of 1em

#wpadminbar .shortlink-input {
    padding: 0 1em;
}

is overridden by the CSS which adds top/bottom padding for #wpadminbar .quicklinks .menupop ul

#wpadminbar .quicklinks .menupop ul,
#wpadminbar .shortlink-input {
    padding: 6px 0;
}

Patch attached uses padding-top and padding-bottom instead of the shorthand for the 6px padding.

See [18695], #18197.

[duck_]

In [19161]:

Don't override .shortlink-input left/right padding of 1em with CSS shorthand later on. Fixes #19147.