Update widget preferences screen

* Add widget color indicator
* Add submenu arrow indicator

app/src/main/java/org/tasks/injection/InjectingPreferenceFragment.kt

@@ -61,8 +61,10 @@ abstract class InjectingPreferenceFragment : PreferenceFragmentCompat() {
         kotlin.system.exitProcess(0)
     }
 
-    protected fun tintColorPreference(resId: Int, tint: Int) {
+    protected fun tintColorPreference(resId: Int, tint: Int) =
-        val pref = findPreference(resId)
+        tintColorPreference(findPreference(resId), tint)
+
+    protected fun tintColorPreference(pref: Preference, tint: Int) {
         pref.icon = DrawableUtil.getWrapped(requireContext(), R.drawable.color_picker)
         DrawableUtil.setTint(pref.icon, tint)
     }

app/src/main/java/org/tasks/preferences/fragments/Widgets.kt

@@ -2,13 +2,14 @@ package org.tasks.preferences.fragments
 
 import android.content.Intent
 import android.os.Bundle
+import androidx.appcompat.content.res.AppCompatResources
 import androidx.lifecycle.lifecycleScope
-import androidx.preference.Preference
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.launch
 import org.tasks.R
 import org.tasks.injection.InjectingPreferenceFragment
 import org.tasks.preferences.DefaultFilterProvider
+import org.tasks.preferences.IconPreference
 import org.tasks.preferences.Preferences
 import org.tasks.widget.AppWidgetManager
 import org.tasks.widget.WidgetConfigActivity
@@ -33,7 +34,14 @@ class Widgets : InjectingPreferenceFragment() {
             preferenceScreen.removeAll()
             appWidgetManager.widgetIds.forEach {
                 val widgetPrefs = WidgetPreferences(context, preferences, it)
-                val pref = Preference(context)
+                val pref = IconPreference(context)
+                tintColorPreference(pref, widgetPrefs.color)
+                pref.drawable = AppCompatResources.getDrawable(
+                    requireContext(),
+                    R.drawable.ic_keyboard_arrow_right_24px
+                )?.mutate()
+                pref.tint = context?.getColor(R.color.icon_tint_with_alpha)
+                pref.iconVisible = true
                 val filter = defaultFilterProvider.getFilterFromPreference(widgetPrefs.filterId)
                 pref.title = filter.listingTitle
                 pref.summary = getString(R.string.widget_id, it)