gitweb: make annotate popup use theme colors

mercurial/templates/static/style-gitweb.css

@@ -59,7 +59,7 b' div.annotate-info {'
   display: none;
   position: absolute;
   background-color: #FFFFFF;
-  border: 1px solid #000000;
+  border: 1px solid #d9d8d1;
   text-align: left;
   color: #000000;
   padding: 5px;

tests/test-hgweb.t

@@ -404,7 +404,7 b' static file'
     display: none;
     position: absolute;
     background-color: #FFFFFF;
-    border: 1px solid #000000;
+    border: 1px solid #d9d8d1;
     text-align: left;
     color: #000000;
     padding: 5px;