feat: document menu available in sidebar (#986)

* feat: document menu available in sidebar

* fix: more accessible blue

* feat: accessible blue
feat: clearer new doc button
closes #983

* lint

app/menus/CollectionMenu.js

@@ -18,12 +18,13 @@ import { DropdownMenu, DropdownMenuItem } from 'components/DropdownMenu';
 
 type Props = {
   label?: React.Node,
-  onOpen?: () => *,
-  onClose?: () => *,
+  position?: 'left' | 'right' | 'center',
   ui: UiStore,
   documents: DocumentsStore,
   collection: Collection,
   history: Object,
+  onOpen?: () => void,
+  onClose?: () => void,
 };
 
 @observer
@@ -88,7 +89,7 @@ class CollectionMenu extends React.Component<Props> {
   };
 
   render() {
-    const { collection, label, onOpen, onClose } = this.props;
+    const { collection, label, position, onOpen, onClose } = this.props;
 
     return (
       <React.Fragment>
@@ -112,6 +113,7 @@ class CollectionMenu extends React.Component<Props> {
           label={label || <MoreIcon />}
           onOpen={onOpen}
           onClose={onClose}
+          position={position}
         >
           {collection && (
             <React.Fragment>