slight tidy of Pi Mouse node

nodes/core/hardware/36-rpi-gpio.html

@@ -73,6 +73,7 @@
     var pinsInUse = {};
     RED.nodes.registerType('rpi-gpio in',{
         category: 'Raspberry Pi',
+        label: 'Raspberry Pi',
         color:"#c6dbef",
         defaults: {
             name: { value:"" },
@@ -211,6 +212,7 @@
     var pinsInUse = {};
     RED.nodes.registerType('rpi-gpio out',{
         category: 'Raspberry Pi',
+        label: 'Raspberry Pi',
         color:"#c6dbef",
         defaults: {
             name: { value:"" },
@@ -330,9 +332,11 @@
 </script>
 
 <script type="text/x-red" data-help-name="rpi-mouse">
-    <p>Raspberry Pi mouse button node. Generates a <b>msg.payload</b> with
+    <p>Raspberry Pi mouse button node. Requires a USB mouse.</p>
+    <p>Generates a <b>msg.payload</b> with
     either a 1 or 0 when the selected mouse button is pressed and released</p>
-    <p>Also sets <b>msg.button</b> to the code value, 1 = left, 2 = right, 4 = middle,
+    <p>Also sets <b>msg.button</b> to the code value
+    <ul><li>1 = left</li><li>2 = right</li><li>4 = middle</li></ul>
     so you can work out which button or combination was pressed.</p>
     <p>And sets <b>msg.topic</b> to <i>pi/mouse</i>.</p>
 </script>
@@ -340,6 +344,7 @@
 <script type="text/javascript">
     RED.nodes.registerType('rpi-mouse',{
         category: 'Raspberry Pi',
+        label: 'Raspberry Pi',
         color:"#c6dbef",
         defaults: {
             name: { value:"" },