fix ref to old icon style

to close #165

Author: Dave Conway-Jones

docs/creating-nodes/config-nodes.md

@@ -36,11 +36,11 @@ key differences:
 
 <script type="text/html" data-template-name="remote-server">
     <div class="form-row">
-        <label for="node-config-input-host"><i class="icon-bookmark"></i> Host</label>
+        <label for="node-config-input-host"><i class="fa fa-bookmark"></i> Host</label>
         <input type="text" id="node-config-input-host">
     </div>
     <div class="form-row">
-        <label for="node-config-input-port"><i class="icon-bookmark"></i> Port</label>
+        <label for="node-config-input-port"><i class="fa fa-bookmark"></i> Port</label>
         <input type="text" id="node-config-input-port">
     </div>
 </script>

docs/creating-nodes/credentials.md

@@ -24,11 +24,11 @@ To add credentials to a node, the following steps are taken:
 2. Add suitable entries to the edit template for the node
     ```html
     <div class="form-row">
-        <label for="node-input-username"><i class="icon-tag"></i> Username</label>
+        <label for="node-input-username"><i class="fa fa-tag"></i> Username</label>
         <input type="text" id="node-input-username">
     </div>
     <div class="form-row">
-        <label for="node-input-password"><i class="icon-tag"></i> Password</label>
+        <label for="node-input-password"><i class="fa fa-tag"></i> Password</label>
         <input type="password" id="node-input-password">
     </div>
     ```

docs/creating-nodes/first-node.md

@@ -127,7 +127,7 @@ For more information about the runtime part of the node, see [here](node-js).
 
 <script type="text/html" data-template-name="lower-case">
     <div class="form-row">
-        <label for="node-input-name"><i class="icon-tag"></i> Name</label>
+        <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
         <input type="text" id="node-input-name" placeholder="Name">
     </div>
 </script>

docs/creating-nodes/properties.md

@@ -27,7 +27,7 @@ property called `prefix` to the node:
 2. Add an entry to the edit template for the node
     ```html
     <div class="form-row">
-        <label for="node-input-prefix"><i class="icon-tag"></i> Prefix</label>
+        <label for="node-input-prefix"><i class="fa fa-tag"></i> Prefix</label>
         <input type="text" id="node-input-prefix">
     </div>
     ```