improve button text overflow when func names are long

libs/universal-dapp.js

@@ -270,6 +270,7 @@ UniversalDApp.prototype.getCallButton = function(args) {
 
     var button = $('<button />')
         .addClass( 'call' )
+        .attr('title', fun.displayName())
         .text(args.bytecode ? 'Create' : fun.displayName())
         .click( handleCallButtonClick );
 

stylesheets/universal-dapp.css

@@ -178,6 +178,8 @@
 	background-color: #666;
 	color: white;
 	cursor: pointer;
+	overflow: hidden;
+    text-overflow: ellipsis;
 }
 
 .udapp .instance input,