Update CSS

Author: theogiraudet

sphinx_treeview/tree.css.jinja

@@ -7,8 +7,8 @@
 
 .stv li li {
   position: relative;
-  padding: .15rem 0 .15rem 1.5rem;
-  margin-left: .5rem;
+  padding: .15rem 0 .15rem 1.25rem;
+  margin-left: .6rem;
   border-left: 1px solid #636363;
 }
 
@@ -17,7 +17,7 @@
   position: absolute;
   top: 0;
   left: -1px;
-  width: .75rem;
+  width: 1rem;
   height: 1.15rem;
   border-left: 1px solid #636363;
   border-bottom: 1px solid #636363;