[FIX] visible text in Chrome on Linux after applying text-to-icon

@include text-to-icon makes the text invisible (and adds an icon), but
some platform apparently don't apply the text's transparency (or
visibility) to its shadow, leading to the invisible text's shadow
still being noticeably visible (an interesting literary idea, an
"invisible" man who still casts a shadow?) as if the text had not been
erased. Furthermore, combined with the 1px font size it made the text
look like some sort of screen smudge or glitch.

Fix by erasing the text-shadow as well as the text.

lp bug: https://launchpad.net/bugs/1158304 fixed

bzr revid: xmo@openerp.com-20130321164741-iakau7g1kfq2mqu4

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

@@ -1269,7 +1269,7 @@
   color: white;
   padding: 2px 4px;
   margin: 1px 6px 0 0;
-  border: 1px solid lightgrey;
+  border: 1px solid lightGray;
   text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
   -moz-border-radius: 4px;
   -webkit-border-radius: 4px;
@@ -1301,7 +1301,7 @@
   transform: scale(1.1);
 }
 .openerp .oe_secondary_submenu .oe_active {
-  border-top: 1px solid lightgrey;
+  border-top: 1px solid lightGray;
   border-bottom: 1px solid #dedede;
   text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
   -moz-box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2), inset 0 -1px 3px rgba(40, 40, 40, 0.2);
@@ -1703,6 +1703,7 @@
   font-size: 1px;
   letter-spacing: -1px;
   color: transparent;
+  text-shadow: none;
   font-weight: normal;
   -moz-box-shadow: none;
   -webkit-box-shadow: none;
@@ -2283,7 +2284,7 @@
 }
 .openerp .oe_form .oe_form_label_help[for] span, .openerp .oe_form .oe_form_label[for] span {
   font-size: 80%;
-  color: darkgreen;
+  color: darkGreen;
   vertical-align: top;
   position: relative;
   top: -4px;
@@ -3017,6 +3018,7 @@
   font-size: 1px;
   letter-spacing: -1px;
   color: transparent;
+  text-shadow: none;
   font-weight: normal;
   margin-right: 7px;
 }

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

@@ -123,6 +123,7 @@ $sheet-padding: 16px
     font-size: 1px
     letter-spacing: -1px
     color: transparent
+    text-shadow: none
     font-weight: normal
     &:before
         font: 21px "mnmliconsRegular"
@@ -133,6 +134,7 @@ $sheet-padding: 16px
     font-size: 1px
     letter-spacing: -1px
     color: transparent
+    text-shadow: none
     font-weight: normal
     &:before
         font: $size "entypoRegular"