Hide review panel when there are no entries.

services/web/app/views/project/editor/editor.jade

@@ -9,7 +9,7 @@ div.full-size(
 	minimum-restore-size-east="300"
 	allow-overflow-on="'center'"
 )
-	.ui-layout-center(ng-controller="ReviewPanelController", ng-class="{'has-review-panel': ui.reviewPanelOpen}")
+	.ui-layout-center(ng-controller="ReviewPanelController", ng-class="{'has-review-panel': ui.reviewPanelOpen, 'has-entries': reviewPanel.hasEntries }")
 		.loading-panel(ng-show="!editor.sharejs_doc || editor.opening")
 			span(ng-show="editor.open_doc_id")
 				i.fa.fa-spin.fa-refresh

services/web/public/coffee/ide/review-panel/controllers/ReviewPanelController.coffee

@@ -7,7 +7,8 @@ define [
 		$scope.reviewPanel =
 			entries: {}
 			trackNewChanges: false
-		
+			hasEntries: false
+
 		$scope.commentState =
 			adding: false
 			content: ""
@@ -51,6 +52,9 @@ define [
 				scroller.off "scroll"
 				$scope.onScroll = null
 
+		$scope.$watch (() -> Object.keys($scope.reviewPanel.entries).length), (nEntries) ->
+			$scope.reviewPanel.hasEntries = nEntries > 0
+
 		# If we listen for scroll events in the review panel natively, then with a Mac trackpad
 		# the scroll is very smooth (natively done I'd guess), but we don't get polled regularly
 		# enough to keep Ace in step, and it noticeably lags. If instead, we borrow the manual

services/web/public/stylesheets/app/editor.less

@@ -43,7 +43,6 @@
 
 #editor {
 	.full-size;
-	right: @review-off-width;
 }
 
 .loading-screen {

services/web/public/stylesheets/app/editor/review-panel.less

@@ -60,6 +60,7 @@
 	}
 
 #review-panel {
+	display: none;
 	position: absolute;
 	width: @review-off-width; 
 	top: 0px;
@@ -366,6 +367,22 @@
 	}
 }
 
+.has-entries {
+	#editor {
+		right: @review-off-width;
+		.ace-editor-body {
+			overflow: visible;
+			.ace_scrollbar-v {
+				right: -@review-off-width;
+			}
+		}
+	}
+
+	#review-panel {
+		display: block;
+	}
+}
+
 .has-review-panel {
 	#editor {
 		right: @review-panel-width;
@@ -384,6 +401,7 @@
 	}
 
 	#review-panel {
+		display: block;
 		width: @review-panel-width;
 		overflow: hidden;
 	}