Fix night mode accent color (commons-app#2098)

Author: Ojonathan

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

@@ -6,5 +6,4 @@
     android:checkMark="?android:attr/textCheckMark"
     android:checked="false"
     android:gravity="center_vertical"
-    android:padding="@dimen/tiny_gap"
-    android:textColor="@color/primaryDarkColor" />
+    android:padding="@dimen/tiny_gap"/>

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

@@ -6,7 +6,7 @@
         <item name="mainBackground">@color/main_background_dark</item>
         <item name="colorPrimary">@color/primaryColor</item>
         <item name="colorPrimaryDark">@color/primaryDarkColor</item>
-        <item name="colorAccent">@color/primaryColor</item>
+        <item name="colorAccent">@color/white</item>
         <item name="colorButtonNormal">@color/primaryColor</item>
 
         <item name="semitransparentText">@color/commons_app_blue_dark</item>