Merge "Null check AvalancheController.delete" into main

     * Run or ignore Runnable for given HeadsUpEntry. If entry was never shown, ignore and delete

     * all Runnables associated with that entry.

     */

    fun delete(entry: HeadsUpEntry, runnable: Runnable, label: String) {

    fun delete(entry: HeadsUpEntry?, runnable: Runnable, label: String) {

        if (!NotificationThrottleHun.isEnabled) {

            runnable.run()

            return

        }

        val fn = "[$label] => AvalancheController.delete " + getKey(entry)

        if (entry == null) {

            log { "$fn => cannot remove NULL entry" }

            return

        }

        if (entry in nextMap) {

            log { "$fn => [remove from next]" }

            if (entry in nextMap) nextMap.remove(entry)