LunaEvent: rework sleep event

Make the UI more flexible and
slightly easier to understand.

app/src/main/java/it/danieleverducci/lunatracker/MainActivity.kt

@@ -462,7 +462,7 @@ class MainActivity : AppCompatActivity() {
             return unixTime - (unixTime % 60)
         }
 
-        fun udpateFields() {
+        fun updateFields() {
             datePickerBegin.text = DateUtils.formatDateTime(sleepBegin)
             datePickerEnd.text = DateUtils.formatDateTime(sleepEnd)
 
@@ -484,18 +484,18 @@ class MainActivity : AppCompatActivity() {
 
         val pickedDateTimeBegin = dateTimePicker(event.time, datePickerBegin) { time: Long ->
             sleepBegin = adjustToMinute(time)
-            udpateFields()
+            updateFields()
         }
 
         val pickedDateTimeEnd = dateTimePicker(event.time + event.quantity, datePickerEnd) { time: Long ->
             sleepEnd = adjustToMinute(time)
-            udpateFields()
+            updateFields()
         }
 
         sleepBegin = adjustToMinute(pickedDateTimeBegin.time.time / 1000)
         sleepEnd = adjustToMinute(pickedDateTimeEnd.time.time / 1000)
 
-        udpateFields()
+        updateFields()
 
         if (showTime) {
             dateDelimiter.visibility = View.GONE
@@ -513,23 +513,23 @@ class MainActivity : AppCompatActivity() {
 
         durationMinus5Button.setOnClickListener {
             sleepEnd = (sleepEnd - 300).coerceAtLeast(sleepBegin)
-            udpateFields()
+            updateFields()
         }
 
         durationPlus5Button.setOnClickListener {
             sleepEnd = (sleepEnd + 300).coerceAtLeast(sleepBegin)
-            udpateFields()
+            updateFields()
         }
 
         durationAsleepButton.setOnClickListener {
             sleepEnd = sleepBegin
-            udpateFields()
+            updateFields()
         }
 
         durationNowButton.setOnClickListener {
             val now = System.currentTimeMillis() / 1000
             sleepEnd = adjustToMinute(now)
-            udpateFields()
+            updateFields()
         }
 
         d.setPositiveButton(android.R.string.ok) { dialogInterface, i ->