fix: add two seconds delay

Author: jvsena42

app/src/main/java/to/bitkit/utils/timedsheets/TimedSheetManager.kt

@@ -51,6 +51,7 @@ class TimedSheetManager(private val scope: CoroutineScope) {
                 _currentSheet.value = null
                 currentTimedSheet = null
             } else {
+                delay(CHECK_DELAY_MILLIS)
                 checkAndShowNextSheet()
             }
         }