Clean up subflow editor

- new appearance of subflow tabs
 - input/output buttons now counters
 - allow multiple input wires to the same node when converting to subflow
 - ensure edit history is propagated properly to instance nodes

editor/sass/header.scss

@@ -47,7 +47,7 @@ span.logo {
     font-size: 30px;
     line-height: 30px;
     text-decoration: none;
-    
+
     span {
         vertical-align: middle;
         font-size: 16px !important;
@@ -55,14 +55,14 @@ span.logo {
     img {
         height: 18px;
     }
-    
+
     a {
         color: inherit;
         &:hover {
             text-decoration: none;
         }
     }
-    
+
 }
 
 .header-toolbar {
@@ -70,13 +70,13 @@ span.logo {
     margin: 0;
     list-style: none;
     float: right;
-    
+
     > li {
         display: inline-block;
         padding: 0;
         margin: 0;
         position: relative;
-        
+
     }
 }
 
@@ -97,19 +97,19 @@ span.logo {
     vertical-align: middle;
     border-left: 2px solid #000;
     border-right: 2px solid #000;
-    
+
     &:hover {
         border-color: $headerMenuItemHover;
     }
 }
 
-.button-group {
+#header .button-group {
     display: inline-block;
     margin: auto 15px;
     vertical-align: middle;
     clear: both;
 }
-.button-group > a {
+#header .button-group > a {
     display: inline-block;
     float: left;
     line-height: 22px;
@@ -122,11 +122,11 @@ span.logo {
 .deploy-button {
     background: $deployButton;
     color: #eee !important;
-    
+
     &:hover {
         background: $deployButtonHover;
     }
-    
+
     &:active {
         background: $deployButtonActive;
         color: #ccc !important;
@@ -134,18 +134,18 @@ span.logo {
 }
 
 #btn-deploy {
-    
+
     padding: 4px 12px;
-    
+
     &.disabled {
         cursor: default;
         background: $deployDisabledButton;
         color: #999 !important;
-        
+
         img {
             opacity: 0.3;
         }
-        
+
         &+ #btn-deploy-options {
             background: $deployDisabledButton;
             color: #ddd;
@@ -157,7 +157,7 @@ span.logo {
             background: $deployDisabledButton;
         }
     }
-    
+
     img {
         margin-right: 8px;
     }
@@ -264,4 +264,3 @@ span.logo {
     font-size: 16px;
     color: #fff;
 }
-