Scroll overflowing tags. Fixes #116

css/app.css

@@ -220,6 +220,11 @@ button small {
     width:350px;
     border-spacing:0;
 }
+.inspector-wrap .tag-table-wrap {
+    max-height:350px;
+    overflow-y:scroll;
+    overflow-x:hidden;
+}
 .inspector-wrap table th {
     text-align:left;
 }

js/id/ui/inspector.js

@@ -50,6 +50,7 @@ iD.Inspector = function() {
                 .attr('class', 'head').call(drawhead);
 
             var table = selection
+                .append('div').attr('class', 'tag-table-wrap')
                 .append('table').attr('class', 'inspector');
 
             table.append('thead').append('tr').selectAll('th')