Update icon picker alpha

app/src/main/java/org/tasks/dialogs/IconPickerAdapter.java

@@ -49,9 +49,9 @@ public class IconPickerAdapter extends ListAdapter<Integer, IconPickerHolder> {
           : ContextCompat.getColor(activity, R.color.icon_tint);
       boolean available = index < 1000 || inventory.hasPro();
       float alpha =
-          available
+          ResourcesCompat.getFloat(
-              ? 1f
+              activity.getResources(),
-              : ResourcesCompat.getFloat(activity.getResources(), R.dimen.alpha_disabled);
+              available ? R.dimen.alpha_primary : R.dimen.alpha_disabled);
       holder.bind(index, icon, tint, alpha, available);
     }
   }

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

@@ -12,6 +12,7 @@
   <dimen name="task_edit_drawable_padding_top_bottom">17dp</dimen>
   <dimen name="task_edit_text_size">16sp</dimen>
 
+  <item format="float" name="alpha_primary" type="dimen">0.87</item>
   <item format="float" name="alpha_secondary" type="dimen">0.54</item>
   <item format="float" name="alpha_disabled" type="dimen">0.38</item>