更新日期选择样式，支持保存清空

bin/defaultstyle.qss

@@ -26,15 +26,12 @@ QLabel#labCheckNum{font-family: Source Han Sans;font-size: 28px;font-weight: nor
 QRadioButton#labCheckNum{font-family: Source Han Sans;font-size: 28px;font-weight: normal;color: #555555;}
 QLineEdit
 {
-border: 1px solid #ABCDA0;
-border-radius: 3px;
-padding-left: 5px;
-background-color: #F2F2F2;
-color: #A0A0A0;
-selection-background-color: #A0A0A0;
-selection-color: #F2F2F2;
-font-family: "Microsoft YaHei";
-font-size: 10pt;
+border:1px solid #cccccc;
+background: #F5F7F9;
+border-radius: 12px;
+width: 400px;
+font-family: Source Han Sans;font-size: 28px;font-weight: normal;color: #999999;
+height: 60px;padding: 5px 20px;
 }
 /*病历管理*/
  QHeaderView::section{font-family: 思源黑体;font-size: 28px;font-weight: 500;color: #054578;}
@@ -86,11 +83,6 @@ color: rgb(13,157,219);
 border-radius: 5px;
 margin-top: 2ex;
 }
-QDateEdit
-{
-border: 1px solid rgb(22,63,23);
-color: black;
-}
 
 QPushButton#ok,#cancel
 {