fix(dialog-box): [dialog-box] modify theme (#2134)

Author: James-9696

packages/theme/src/dialog-box/index.less

@@ -125,11 +125,8 @@
   & &__body {
     text-align: left;
     padding: var(--ti-dialog-box-body-padding-vertical) var(--ti-dialog-box-body-padding-horizontal);
-    margin-bottom: var(--ti-dialog-box-body-margin-bottom);
     color: var(--ti-dialog-box-body-text-color);
     font-size: var(--ti-dialog-box-body-font-size);
-    overflow: auto;
-    max-height: 65vh;
 
     .@{css-prefix}upload {
       overflow: hidden;

packages/theme/src/dialog-box/vars.less

@@ -134,4 +134,8 @@
   --ti-dialog-box-resize-icon-color-hover: var(--ti-common-color-icon-normal);
   // 缩放按钮大小
   --ti-dialog-box-resize-icon-size: var(--ti-common-font-size-2);
+  // 按钮距离顶部距离
+  --ti-dialog-box-btn-tools-position-top: var(--ti-common-size-3x);
+  // 按钮距离右侧距离
+  --ti-dialog-box-btn-tools-position-right: var(--ti-common-size-3x);
 }