[4.0] Toolbar spacing

[brianteeman]

Since the changes in #31990

It should be

[dgrammatiko]

The final css needs to change from:

.subhead .btn-group,.subhead joomla-toolbar-button {
    -webkit-margin-start: .75rem;
    margin-inline-start: .75rem;}

to

.subhead .btn-group,.subhead joomla-toolbar-button {
    -webkit-margin-start: .75rem;
    margin-inline-start: .75rem;}
.subhead .btn-group > joomla-toolbar-button {
        -webkit-margin-start: 0rem;
    margin-inline-start: 0rem;
}

[brianteeman]

Thanks @dgrammatiko