Umind module develop (#3029)

* complete loading step

* update code struct

* add minimap

* add save btn

* add save handler

* get the data after modify

* optimized umind style

* add save method

* optimized code

* delete console

* update dependencies

* update conf

* delete unnecessary code

* delete umind create button

frontend/src/css/umind.css

@@ -0,0 +1,71 @@
+#wrapper {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  overflow: hidden;
+}
+
+.umind-container {
+  display: flex;
+  flex: 1;
+  flex-direction: column;
+}
+
+.umind-container .umind-header {
+  padding: 8px;
+  border: 1px solid #E6E9ED;
+}
+
+.umind-container .umind-body {
+  display: flex;
+  flex: 1;
+}
+
+.toolbar-container {
+  display: flex;
+}
+
+.toolbar-container .custom-toolbar {
+  width: auto;
+}
+
+.toolbar-container .common-toolbar {
+  display: flex;
+  flex: 1;
+}
+
+
+.umind-body .umind-editor-content,
+.umind-body .umind-editor-sidebar {
+  display: flex;
+  flex-direction: column;
+}
+
+.umind-editor-content .umind-editor {
+  display: flex;
+  flex: 1;
+  background-color: #eee;
+}
+
+.umind-editor-sidebar {
+  background: #FAFAFA;
+}
+
+.umind-editor-sidebar:first-child {
+  border-right: 1px solid #E6E9ED;
+}
+
+.umind-editor-sidebar:last-child {
+  border-left: 1px solid #E6E9ED;
+}
+
+.umind-editor-sidebar .detail-panel {
+  flex: 1;
+  display: flex;
+  background: #FAFAFA;
+}
+
+.detail-panel .node-detail {
+ flex: 1;
+ background: #FAFAFA;
+}