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

@@ -0,0 +1,66 @@
+dialog {
+    width: 100%;
+    text-align: center;
+    max-width: 20em;
+    color: white;
+    background-color: #000;
+    border: none;
+    position: relative;
+    transform: translate(-50%, -50%);
+}
+
+#progress-container {
+    position: absolute;
+    top: 50%;
+    left: 50%;
+}
+
+progress {
+    width: 100%;
+    height: 1em;
+    border: none;
+    background-color: #fff;
+    color: #eee;
+}
+
+progress::-webkit-progress-bar {
+    background-color: #333;
+}
+
+progress::-webkit-progress-value {
+    background-color: #eee;
+}
+
+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;
+}