Fix a number of styling bugs

common/static/common/js/discussion/views/discussion_thread_list_view.js

@@ -91,6 +91,7 @@
             DiscussionThreadListView.prototype.initialize = function(options) {
                 var self = this;
                 this.courseSettings = options.courseSettings;
+                this.supportsActiveThread = options.supportsActiveThread;
                 this.displayedCollection = new Discussion(this.collection.models, {
                     pages: this.collection.pages
                 });
@@ -164,7 +165,7 @@
                 active = $currentElement.has('.forum-nav-thread-link.is-active').length !== 0;
                 $currentElement.replaceWith($content);
                 this.showMetadataAccordingToSort();
-                if (active) {
+                if (this.supportsActiveThread && active) {
                     this.setActiveThread(threadId);
                 }
             };
@@ -347,7 +348,9 @@
             DiscussionThreadListView.prototype.threadSelected = function(e) {
                 var threadId;
                 threadId = $(e.target).closest('.forum-nav-thread').attr('data-id');
-                this.setActiveThread(threadId);
+                if (this.supportsActiveThread) {
+                    this.setActiveThread(threadId);
+                }
                 this.trigger('thread:selected', threadId);
                 return false;
             };

lms/djangoapps/discussion/static/discussion/js/views/discussion_board_view.js

@@ -45,7 +45,8 @@
                 this.discussionThreadListView = new DiscussionThreadListView({
                     collection: this.discussion,
                     el: this.$('.discussion-thread-list-container'),
-                    courseSettings: this.courseSettings
+                    courseSettings: this.courseSettings,
+                    supportsActiveThread: true
                 }).render();
                 this.searchView = new DiscussionSearchView({
                     el: this.$('.forum-search')

lms/static/sass/discussion/elements/_labels.scss

 // discussion - elements - labels
 // ====================
 
-body.discussion, .discussion-module {
+.forum-nav-thread {
   .post-label {
     @include margin($baseline/4, $baseline/2, 0, 0);
     @extend %t-weight4;

lms/static/sass/discussion/elements/_navigation.scss

@@ -205,7 +205,7 @@
     @include padding-left(0);
     list-style: none;
 
-    li {
+    .forum-nav-thread {
         margin: 0;
     }
 }
@@ -239,6 +239,10 @@
             background-color: $forum-color-hover-thread;
         }
 
+        &.is-active {
+            background-color: $forum-color-reading-thread;
+        }
+
         .forum-nav-thread-unread-comments-count {
             display: inline-block;
             font-size: $forum-small-font-size;
@@ -246,8 +250,6 @@
         }
     }
 
-    .discussion:not(.inline-discussion)
-
     &.never-read {
         .forum-nav-thread-link {
             @include border-left(3px solid $forum-color-never-read-post);
@@ -256,40 +258,6 @@
     }
 }
 
-.discussion.discussion-board {
-    .forum-nav-thread {
-        .forum-nav-thread-link.is-active {
-            color: $forum-color-background;
-            background-color: $forum-color-reading-thread;
-
-            .forum-nav-thread-labels > li {
-                border-color: $forum-color-background;
-                color: $forum-color-background;
-            }
-
-            .forum-nav-thread-votes-count {
-                color: $forum-color-background;
-            }
-
-            .forum-nav-thread-comments-count {
-                color: $base-font-color;
-
-                &:after {
-                    @include border-right-color($forum-color-border);
-                }
-            }
-
-            span.icon {
-                color: $forum-color-background;
-            }
-
-            .thread-preview-body {
-                color: $forum-color-background;
-            }
-        }
-    }
-}
-
 %forum-nav-thread-wrapper {
     display: inline-block;
     vertical-align: middle;

lms/static/sass/discussion/utilities/_variables-v1.scss

@@ -20,8 +20,8 @@ $forum-color-border: $gray-l3 !default;
 $forum-color-error: $red !default;
 $forum-color-hover-thread: #f6f6f6 !default;
 $forum-color-reading-thread: $gray-d3 !default;
-$forum-color-read-post: $forum-color-primary !default;
-$forum-color-never-read-post: $gray-d3 !default;
+$forum-color-read-post: $gray-d3 !default;
+$forum-color-never-read-post: $forum-color-primary !default;
 $forum-color-editor-preview-label: $gray-d2 !default;
 $forum-color-response-count: $gray-d2 !default;
 $forum-color-navigation-bar: #f6f6f6 !default;

lms/static/sass/discussion/utilities/_variables-v2.scss

@@ -19,7 +19,7 @@ $forum-color-marked-answer: palette(success, text) !default;
 $forum-color-border: palette(grayscale, back) !default;
 $forum-color-error: palette(error, accent) !default;
 $forum-color-hover-thread: palette(grayscale, x-back) !default;
-$forum-color-reading-thread: $forum-color-primary !default;
+$forum-color-reading-thread: palette(grayscale, x-back) !default;
 $forum-color-read-post: palette(grayscale, base) !default;
 $forum-color-never-read-post: $forum-color-primary !default;
 $forum-color-editor-preview-label: palette(grayscale, base) !default;