Improve mouse cursor handling.

Audio_Track.C

@@ -79,8 +79,13 @@ Audio_Track::handle ( int m )
 
             printf( "pasted file \"%s\"\n", file );
 
+            fl_cursor( FL_CURSOR_WAIT );
+            Fl::check();
+
             Audio_File *c = Audio_File::from_file( file );
 
+            fl_cursor( FL_CURSOR_DEFAULT );
+
             if ( ! c )
             {
                 free( file );

Region.C

@@ -225,10 +225,12 @@ Region::handle ( int m )
     {
         case FL_ENTER:
             _current = true;
+            Track_Widget::handle( m );
             redraw();
             break;
         case FL_LEAVE:
             _current = false;
+            Track_Widget::handle( m );
             redraw();
             break;
         case FL_PUSH: