Merge pull request #3201 from lzxb/dev-1.5.0

Update buttonicon.css

themes/default/_css/buttonicon.css

@@ -403,7 +403,7 @@
 }
 
 .edui-default  .edui-for-charts  .edui-icon {
-    background: url( ../images/charts.png ) no-repeat 2px 3px!important;
+    background: url(../images/charts.png) no-repeat 2px 3px!important;
 }
 
 .edui-default  .edui-for-inserttitlecol  .edui-icon {
@@ -416,4 +416,4 @@
 
 .edui-default  .edui-for-simpleupload  .edui-icon {
     background-position: -380px 0px;
-}
\ No newline at end of file
+}