Issue #2083945 by Outi: Dblog.module: Update use of icons.

core/modules/dblog/css/dblog.module.css

@@ -45,11 +45,20 @@
   width: 16px;
 }
 .admin-dblog .dblog-warning .icon {
-  background-image: url(../../../misc/message-16-warning.png);
+  background-image: url(../../../misc/icons/e29700/warning.svg);
+}
+.no-svg .admin-dblog .dblog-warning .icon {
+  background-image: url(../../../misc/icons/e29700/warning.png);
 }
 .admin-dblog .dblog-error .icon,
 .admin-dblog .dblog-critical .icon,
 .admin-dblog .dblog-alert .icon,
 .admin-dblog .dblog-emergency .icon {
-  background-image: url(../../../misc/message-16-error.png);
+  background-image: url(../../../misc/icons/ea2800/error.svg);
+}
+.no-svg .admin-dblog .dblog-error .icon,
+.no-svg .admin-dblog .dblog-critical .icon,
+.no-svg .admin-dblog .dblog-alert .icon,
+.no-svg .admin-dblog .dblog-emergency .icon {
+  background-image: url(../../../misc/icons/ea2800/error.png);
 }