fix: reset timers

reset timers correctly when current event is deleted

server/src/classes/EventTimer.js

@@ -1066,8 +1066,8 @@ export class EventTimer extends Timer {
   }
 
   unload() {
-    // reset duration
-    this.duration = null;
+    // reset timer
+    this._resetTimers(true);
 
     // reset selected
     this._resetSelection();

server/src/classes/Timer.js

@@ -120,6 +120,7 @@ export class Timer {
   _resetTimers(total = false) {
     if (total) this.duration = null;
     this.current = this.duration;
+    this.running = null;
     this.secondaryTimer = null;
     this._finishAt = null;
     this._finishedAt = null;