Fixed a minor theming issue

app/src/main/java/de/kuschku/util/ui/preferences/MaterialListPreference.java

@@ -39,6 +39,7 @@ import com.afollestad.materialdialogs.MaterialDialog;
 
 import java.lang.reflect.Field;
 
+import de.kuschku.quasseldroid_ng.R;
 import de.kuschku.util.annotationbind.AutoBinder;
 
 /**
@@ -120,7 +121,7 @@ public class MaterialListPreference extends ListPreference {
                             break;
                     }
                 })
-                .backgroundColor(AutoBinder.obtainColor(de.kuschku.quasseldroid_ng.R.attr.colorBackgroundDialog, context.getTheme()))
+                .backgroundColor(AutoBinder.obtainColor(R.attr.colorBackground, context.getTheme()))
                 .negativeText(getNegativeButtonText())
                 .items(getEntries())
                 .autoDismiss(true) // immediately close the dialog after selection

app/src/main/res/values/attrs.xml

@@ -76,7 +76,6 @@
     <attr name="colorBackgroundHighlight" format="color"/>
     <attr name="colorBackgroundSecondary" format="color"/>
     <attr name="colorBackgroundCard" format="color"/>
-    <attr name="colorBackgroundDialog" format="color"/>
 
     <!-- Tint colors for drawer -->