Avoid empty comment replies.

services/web/app/views/project/editor/review-panel.jade

@@ -195,10 +195,16 @@ script(type='text/ng-template', id='commentEntryTemplate')
 					placeholder="{{ 'Hit \"Enter\" to reply' + (entry.resolved ? ' and re-open' : '') }}"
 				)
 			.rp-entry-actions
-				a.rp-entry-button(href, ng-click="animateAndCallOnResolve();", ng-if="permissions.comment && permissions.write") 
+				button.rp-entry-button(
+					ng-click="animateAndCallOnResolve();"
+					ng-if="permissions.comment && permissions.write"
+				) 
 					i.fa.fa-inbox
 					|  Resolve
-				a.rp-entry-button(href, ng-click="onReply();", ng-if="permissions.comment")
+				button.rp-entry-button(
+					ng-click="onReply();"
+					ng-if="permissions.comment"
+					ng-disabled="!entry.replyContent.length")
 					i.fa.fa-reply
 					|  Reply
 	
@@ -214,7 +220,7 @@ script(type='text/ng-template', id='resolvedCommentEntryTemplate')
 						href
 						ng-if="needsCollapsing"
 						ng-click="toggleCollapse();"
-					)  {{ isCollapsed ? '(more)' : '(less)' }}
+					)  {{ isCollapsed ? '... (show all)' : ' (show less)' }}
 			.rp-comment(
 				ng-repeat="comment in thread.messages track by comment.id"
 			)

services/web/public/coffee/ide/review-panel/directives/commentEntry.coffee

@@ -18,8 +18,9 @@ define [
 			scope.handleCommentReplyKeyPress = (ev) ->
 				if ev.keyCode == 13 and !ev.shiftKey and !ev.ctrlKey and !ev.metaKey
 					ev.preventDefault()
-					ev.target.blur()
-					scope.onReply()
+					if scope.entry.length > 0 
+						ev.target.blur()
+						scope.onReply()
 			
 			scope.animateAndCallOnResolve = () ->
 				scope.state.animating = true

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

@@ -36,12 +36,25 @@
 	color: #FFF;
 	text-align: center;
 	line-height: 1.3;
+	user-select: none;
+	border: 0;
+
 	&:hover,
 	&:focus {
+		outline: 0;
 		background-color: darken(@rp-highlight-blue, 5%);
 		text-decoration: none;
 		color: #FFF;
 	}
+
+	&[disabled] {
+		opacity: 0.5;
+
+		&:hover,
+		&:focus {
+			background-color: @rp-highlight-blue;
+		}
+	}
 }
 
 .triangle(@_, @width, @height, @color) {