Update navigation panel in proposal route to be properly styled

Fix nav panel width and inconsistent background colour for proposal editor page

Author: varunks99

src/user/proposals/ProposalEditor/ProposalEditor.js

@@ -6,13 +6,15 @@ import "./ProposalEditor.scss";
 class ProposalEditor extends Component {
   constructor(props) {
     super(props);
-    this.state = {};
+    this.state = {
+      org: true
+    };
   }
   render() {
     return (
       <div className="editor">
         <div className="editor__navigation">
-          <Navigation dashboard={this.state.dashboard} />
+          <Navigation org={this.state.org} />
         </div>
         <div className="editor__content">
           <EditorContent />

src/user/proposals/ProposalEditor/ProposalEditor.scss

@@ -4,8 +4,9 @@
   height: auto;
   font-family: Muli, sans-serif;
   .editor__navigation {
-    flex: 1;
+    flex: 0.5;
     border-right: solid 1px #dfe9f1;
+    background: #f5f5f5;
   }
   .editor__content {
     flex: 5.5;