show more data in txinfo modal and fee on main table.

- also center-align icons in main table.
- and use "x time ago" instead of raw dates by default in main table
  (raw date is accessible on a tooltip, on the modal and on the CSV export).

lnbits/static/scss/base.scss

@@ -52,6 +52,10 @@ body.body--dark .q-field--error {
   width: 500px;
 }
 
+.lnbits__q-table__icon-td {
+  text-align: center;
+}
+
 .q-table--dense {
   th:first-child,
   td:first-child,