Fix purchase dialog button color

app/src/main/java/org/tasks/billing/PurchaseActivity.java

@@ -7,17 +7,21 @@ import androidx.fragment.app.FragmentManager;
 import javax.inject.Inject;
 import org.tasks.injection.ActivityComponent;
 import org.tasks.injection.InjectingAppCompatActivity;
+import org.tasks.themes.ThemeAccent;
 
 public class PurchaseActivity extends InjectingAppCompatActivity {
 
   private static final String FRAG_TAG_PURCHASE = "frag_tag_purchase";
 
   @Inject Inventory inventory;
+  @Inject ThemeAccent themeAccent;
 
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
 
+    themeAccent.applyStyle(getTheme());
+
     FragmentManager fragmentManager = getSupportFragmentManager();
     PurchaseDialog dialog = (PurchaseDialog) fragmentManager.findFragmentByTag(FRAG_TAG_PURCHASE);
     if (dialog == null) {

app/src/main/res/layout/dialog_purchase.xml

@@ -26,6 +26,7 @@
       android:id="@+id/feature_list"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
+      android:paddingTop="16dp"
       android:textAppearance="@style/TextAppearance.MaterialComponents.Body2"/>
 
   </LinearLayout>