修改项目讨论区未选择置顶/锁定选项时显示异常

public/stylesheets/application.css

@@ -137,7 +137,7 @@ a:hover.more{ color:#64bdd9;}
 .problem_pic:hover{border:1px solid #64bdd9;}
 .problem_txt{ width:610px; margin-left:10px; color:#777777;}
 .problem_name{ color:#ff5722 !important;}
-.problem_line{margin-top:5px;}
+.problem_line{margin-top:5px;float:left;}
 .problem_name:hover{ color:#d33503;}
 .problem_tit{ color:#0781b4 !important; width:430px; display:block; overflow:hidden; white-space: nowrap; text-overflow:ellipsis;}
 .problem_tit:hover{ color:#09658c !important; }