Revert "new-call-box: Clear entry after dialing"

This reverts commit 528fb11dcd.

It is cumbersome having to retype everything
if you've made a mistake when entering a number.

src/calls-new-call-box.c

@@ -228,8 +228,6 @@ dial_clicked_cb (CallsNewCallBox *self)
     calls_main_window_dial (CALLS_MAIN_WINDOW (window), text);
   else
     calls_new_call_box_dial (self, text);
-
-  gtk_entry_set_text (entry, "");
 }
 
 static void
@@ -242,8 +240,6 @@ dial_result_clicked_cb (CallsNewCallBox *self)
     calls_origin_dial (origin, address);
   else
     g_warning ("No suitable origin found. How was this even clicked?");
-
-  gtk_entry_set_text (self->address_entry, "");
 }