Hide delete all on selection

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -3477,8 +3477,9 @@ public class FragmentMessages extends FragmentBase implements SharedPreferences.
             menu.findItem(R.id.menu_sort_on_snoozed).setVisible(false);
         }
 
-        menu.findItem(R.id.menu_empty_trash).setVisible(EntityFolder.TRASH.equals(type) && folder);
-        menu.findItem(R.id.menu_empty_spam).setVisible(EntityFolder.JUNK.equals(type) && folder);
+        boolean unselected = (selectionTracker == null || !selectionTracker.hasSelection());
+        menu.findItem(R.id.menu_empty_trash).setVisible(EntityFolder.TRASH.equals(type) && folder && unselected);
+        menu.findItem(R.id.menu_empty_spam).setVisible(EntityFolder.JUNK.equals(type) && folder && unselected);
 
         if ("time".equals(sort))
             menu.findItem(R.id.menu_sort_on_time).setChecked(true);