Simpler thumbnail selection border

thumbs.c

@@ -375,11 +375,8 @@ void tns_highlight(tns_t *tns, win_t *win, int n, Bool hl) {
 		else
 			col = win->bgcol;
 
-		win_draw_rect(win, win->pm, t->x - 3, t->y - 3, t->w + 6, t->h + 6,
-		              False, 4, col);
-		if (hl)
-		win_draw_rect(win, win->pm, t->x - 3, t->y - 3, t->w + 5, t->h + 5,
-		              False, 1, win->black);
+		win_draw_rect(win, win->pm, t->x - 4, t->y - 4, t->w + 8, t->h + 8,
+		              False, 2, col);
 	}
 
 	win_draw(win);