set same start and end time by default, different only from week grid

app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt

@@ -108,7 +108,9 @@ class EventActivity : SimpleActivity(), DBHelper.EventUpdateListener {
         window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE)
         title = resources.getString(R.string.new_event)
         mEventStartDateTime = dateTime
-        mEventEndDateTime = mEventStartDateTime.plusHours(1)
+
+        val addHours = if (intent.getBooleanExtra(NEW_EVENT_SET_HOUR_DURATION, false)) 1 else 0
+        mEventEndDateTime = mEventStartDateTime.plusHours(addHours)
     }
 
     private fun showReminder1Dialog() {

app/src/main/kotlin/com/simplemobiletools/calendar/fragments/WeekFragment.kt

@@ -188,6 +188,7 @@ class WeekFragment : Fragment(), WeeklyCalendar {
                             val timestamp = mWeekTimestamp + index * DAY_SECONDS + hour * 60 * 60
                             Intent(context, EventActivity::class.java).apply {
                                 putExtra(NEW_EVENT_START_TS, timestamp)
+                                putExtra(NEW_EVENT_SET_HOUR_DURATION, true)
                                 startActivity(this)
                             }
                         }

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Constants.kt

@@ -10,6 +10,7 @@ val YEAR_LABEL = "year"
 val EVENT_ID = "event_id"
 val NEW_EVENT_START_TS = "new_event_start_ts"
 val WEEK_START_TIMESTAMP = "week_start_timestamp"
+val NEW_EVENT_SET_HOUR_DURATION = "new_event_set_hour_duration"
 
 val MONTHLY_VIEW = 1
 val YEARLY_VIEW = 2