Work on #3102. Moved all the components out of model.jsx into their own files so they can be grabbed via getComponent()

src/core/components/model-collapse.jsx

@@ -0,0 +1,40 @@
+import React, { Component, PropTypes } from "react"
+
+export default class ModelCollapse extends Component {
+  static propTypes = {
+    collapsedContent: PropTypes.any,
+    collapsed: PropTypes.bool,
+    children: PropTypes.any
+  }
+
+  static defaultProps = {
+    collapsedContent: "{...}",
+    collapsed: true,
+  }
+
+  constructor(props, context) {
+    super(props, context)
+
+    let { collapsed, collapsedContent } = this.props
+
+    this.state = {
+      collapsed: collapsed !== undefined ? collapsed : ModelCollapse.defaultProps.collapsed,
+      collapsedContent: collapsedContent || ModelCollapse.defaultProps.collapsedContent
+    }
+  }
+
+  toggleCollapsed=()=>{
+    this.setState({
+      collapsed: !this.state.collapsed
+    })
+  }
+
+  render () {
+    return (<span>
+      <span onClick={ this.toggleCollapsed } style={{ "cursor": "pointer" }}>
+        <span className={ "model-toggle" + ( this.state.collapsed ? " collapsed" : "" ) }></span>
+      </span>
+      { this.state.collapsed ? this.state.collapsedContent : this.props.children }
+    </span>)
+  }
+}