Add icons to task defaults settings

app/src/main/res/xml/preferences_task_defaults.xml

@@ -1,10 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto">
+
+  <Preference
+    android:icon="@drawable/ic_outline_cloud_24px"
+    android:key="@string/p_default_remote_list"
+    android:title="@string/default_sync"
+    app:allowDividerAbove="true" />
+
   <ListPreference
     android:defaultValue="2"
     android:entries="@array/EPr_default_importance"
     android:entryValues="@array/EPr_default_importance_values"
+    android:icon="@drawable/ic_outline_flag_24px"
     android:key="@string/p_default_importance_key"
     android:summary="%s"
     android:title="@string/EPr_default_importance_title" />
@@ -13,29 +21,36 @@
     android:defaultValue="0"
     android:entries="@array/EPr_default_urgency"
     android:entryValues="@array/EPr_default_urgency_values"
+    android:icon="@drawable/ic_outline_schedule_24px"
     android:key="@string/p_default_urgency_key"
     android:summary="%s"
     android:title="@string/EPr_default_urgency_title" />
 
-  <Preference
-    android:key="@string/p_default_remote_list"
-    android:title="@string/default_sync" />
-
   <ListPreference
     android:defaultValue="0"
     android:entries="@array/EPr_default_hideUntil"
     android:entryValues="@array/EPr_default_hideUntil_values"
+    android:icon="@drawable/ic_outline_visibility_off_24px"
     android:key="@string/p_default_hideUntil_key"
     android:summary="%s"
     android:title="@string/EPr_default_hideUntil_title" />
 
+  <Preference
+    android:defaultValue="-1"
+    android:icon="@drawable/ic_outline_event_24px"
+    android:key="@string/gcal_p_default"
+    android:summary="@string/dont_add_to_calendar"
+    android:title="@string/default_calendar" />
+
   <ListPreference
     android:defaultValue="6"
     android:entries="@array/EPr_default_reminders"
     android:entryValues="@array/EPr_default_reminders_values"
+    android:icon="@drawable/ic_outline_notifications_24px"
     android:key="@string/p_default_reminders_key"
     android:summary="%s"
-    android:title="@string/EPr_default_reminders_title" />
+    android:title="@string/EPr_default_reminders_title"
+    app:allowDividerAbove="true" />
 
   <ListPreference
     android:defaultValue="0"
@@ -53,12 +68,6 @@
     android:summary="%s"
     android:title="@string/EPr_default_reminders_mode_title" />
 
-  <Preference
-    android:defaultValue="-1"
-    android:key="@string/gcal_p_default"
-    android:summary="@string/dont_add_to_calendar"
-    android:title="@string/default_calendar" />
-
   <ListPreference
     android:defaultValue="1"
     android:entries="@array/EPr_default_location_reminder"