Fix file picker theme

src/main/AndroidManifest.xml

@@ -385,7 +385,7 @@
         <activity
             android:name=".files.MyFilePickerActivity"
             android:label="@string/app_name"
-            android:theme="@style/FilePickerTheme">
+            android:theme="@style/Tasks">
             <intent-filter>
                 <action android:name="android.intent.action.GET_CONTENT" />
                 <category android:name="android.intent.category.DEFAULT" />

src/main/java/org/tasks/files/MyFilePickerActivity.java

@@ -4,12 +4,15 @@ import android.os.Bundle;
 
 import com.nononsenseapps.filepicker.FilePickerActivity;
 
+import org.tasks.R;
 import org.tasks.injection.ActivityModule;
 import org.tasks.injection.InjectingApplication;
 import org.tasks.themes.Theme;
 
 import javax.inject.Inject;
 
+import static org.tasks.preferences.ResourceResolver.getData;
+
 public class MyFilePickerActivity extends FilePickerActivity {
 
     @Inject Theme theme;
@@ -23,5 +26,6 @@ public class MyFilePickerActivity extends FilePickerActivity {
         theme.applyThemeAndStatusBarColor(this, getDelegate());
         setTitle(null);
         super.onCreate(savedInstanceState);
+        getWindow().getDecorView().setBackgroundColor(getData(this, R.attr.asContentBackground));
     }
 }

src/main/res/values/styles.xml

@@ -108,16 +108,8 @@
         <item name="android:layout_gravity">end|bottom</item>
     </style>
 
-    <!-- ==================================================== TaskAdapter == -->
-
     <style name="task_list_container"/>
 
-    <style name="FilePickerTheme" parent="NNF_BaseTheme.Light">
-         <item name="nnf_toolbarTheme">?attr/overlay_theme</item>
-    </style>
-
-    <!-- ========================================================= Premium == -->
-
     <style name="TextAppearance.Medium">
         <item name="android:textSize">18sp</item>
     </style>

src/main/res/values/theme.xml

@@ -18,6 +18,8 @@
         <item name="android:textColorPrimary">@color/text_primary</item>
         <item name="android:textColorSecondary">@color/text_secondary</item>
         <item name="android:textColorTertiary">@color/text_tertiary</item>
+        <item name="nnf_toolbarTheme">?attr/overlay_theme</item>
+        <item name="nnf_separator_color">@color/nnf_light_separator_color</item>
     </style>
 
     <style name="TasksOverride" parent="Tasks">