[FIX] view list: some title not align with other.

bzr revid: chm@openerp.com-20130606104145-jezs2u9tr3xb3fmh

addons/web/static/src/css/base.css

@@ -2923,7 +2923,6 @@
   position: relative;
 }
 .openerp .oe_list_content th.oe_sortable div:after {
-  float: right;
   margin-right: 6px;
   content: "";
   margin-top: 7px;
@@ -2933,6 +2932,7 @@
   visibility: hidden;
 }
 .openerp .oe_list_content th.sortup div:after {
+  float: right;
   visibility: visible;
   filter: alpha(opacity=60);
   opacity: 0.6;
@@ -2941,6 +2941,7 @@
   min-width: 70px;
 }
 .openerp .oe_list_content th.sortdown div:after {
+  float: right;
   border-bottom: none;
   border-left: 4px solid transparent;
   border-right: 4px solid transparent;