EditHabitActivity: Dismiss all fragments on device rotation

android/uhabits-android/src/main/java/org/isoron/uhabits/activities/common/dialogs/FrequencyPickerDialog.kt

@@ -37,6 +37,8 @@ class FrequencyPickerDialog(var freqNumerator: Int,
     lateinit var contentView: View
     var onFrequencyPicked: (num: Int, den: Int) -> Unit = {_,_ -> }
 
+    constructor() : this(1, 1)
+
     override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
         val inflater = LayoutInflater.from(activity!!)
         contentView = inflater.inflate(R.layout.frequency_picker_dialog, null)

android/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/edit/EditHabitActivity.kt

@@ -25,6 +25,7 @@ import android.os.*
 import android.text.format.*
 import android.view.*
 import androidx.appcompat.app.*
+import androidx.fragment.app.*
 import com.android.datetimepicker.time.*
 import kotlinx.android.synthetic.main.activity_edit_habit.*
 import org.isoron.androidbase.utils.*
@@ -151,6 +152,10 @@ class EditHabitActivity : AppCompatActivity() {
         binding.buttonSave.setOnClickListener {
             if(validate()) save()
         }
+
+        for (fragment in supportFragmentManager.fragments) {
+            (fragment as DialogFragment).dismiss()
+        }
     }
 
     private fun save() {