Pull request #2648: 无jira任务 fix:solid风格树展开线偏移不正确

Merge in VISUAL/fineui from ~AEOLUS.ZHANG/fineui:master to master

* commit 'a8f0b270317158a77134746184a000015fe2d744':
  无jira任务 fix:solid风格树展开线偏移不正确

src/less/base/tree/tree.expander.less

@@ -12,7 +12,7 @@
 .bi-tree-expander-popup.line.solid:before {
   .imagePath(@icon-tree-solid-vertical-line-1, 0, 0, repeat-y);
   width: 24px;
-  left:4px;
+  left: 8px;
 }
 
 .bi-theme-dark {
@@ -23,6 +23,6 @@
   .bi-tree-expander-popup.line.solid:before {
     .imagePath(@icon-tree-solid-vertical-line-1-theme-dark, 0, 0, repeat-y);
     width: 24px;
-    left:4px;
+    left: 8px;
   }
 }