Drop the hardcode width of record labels

The width is supposed to be controlled by bootstrap's grid classes.

Previously it was overridden by bootstrap's "flex" rule for col-*
classes, e.g.

    .col-3 {
      flex: 0 0 25%;
      max-width: 25%;
    }

As bootstrap 5 updates rules with an additional "width":

    .col-3 {
      flex: 0 0 auto;
      width: 25%;
    }

We need to drop this high-precedence rule.

share/static/css/elevator-light/record.css

@@ -1,6 +1,5 @@
 .record .record-field .label {
     display: inline-block;
-    width: 8em;
     font-weight: bold;
     text-align: right;
 }