Update preview nodes

- Support custom background color in preview node
- Fix Preview node does not update automatically with same mesh name
- Add system config file that allow custom clients IP address

web/style/sharedStyle.css

@@ -33,4 +33,34 @@ progress::-webkit-progress-value {
 
 progress::-moz-progress-bar {
     background-color: #eee;
+}
+
+
+#container {
+    position: absolute;
+    top: 0%;
+    left: 0%;
+    width: 100%;
+    height: 100%;
+}
+
+.clr-field {
+    margin-left: 5px;
+    margin-top: 5px;
+}
+
+.clr-field button {
+    width: 20px;
+    height: 20px;
+    left: 5px;
+    right: auto;
+    border-radius: 5px;
+}
+
+.clr-field input {
+    padding-left: 36px;
+    width: 120px;
+    height: 24px;
+    border: 2px solid #aaa;
+    border-radius: 5px;
 }