fix: the machine's dot in the + menu centred like the other icons

internal/server/web/static/app.css

@@ -1054,7 +1054,7 @@ body.no-motion *, body.no-motion *::before, body.no-motion *::after, body.no-mot
 /* Close buttons stay square, however tight the row they are in. */
 .btn.close.x { flex:none; aspect-ratio:1; min-width:0; }
 .ai-head .ai-close { width:32px; height:32px; }
-.addmenu .ico .dot { display:inline-block; vertical-align:middle; }
+.addmenu .ico .dot { display:inline-block; vertical-align:middle; margin:0; }
 /* Машины: each column's name over the middle of its values (on a computer;
    a phone lays the rows out as blocks). */
 @media (min-width: 641px) {