Merge branch '874-tree-indicator' into 'master'

Darken thread indicator

Closes #874

See merge request !525

briar-android/src/main/res/drawable/level_indicator_circle.xml

@@ -5,5 +5,5 @@
 
 	<stroke
 		android:width="2dp"
-		android:color="@color/forum_discussion_nested_line"/>
+		android:color="@color/thread_indicator"/>
 </shape>
\ No newline at end of file

briar-android/src/main/res/values/color.xml

@@ -33,11 +33,12 @@
 
 	<!-- this is needed as preference_category_material layout uses this color as the text color -->
 	<color name="preference_fallback_accent_color">@color/briar_accent</color>
+
+	<color name="thread_indicator">#9e9e9e</color>
 	<color name="divider">#c1c1c1</color>
 	<color name="default_separator_inverted">#ffffff</color>
 	<color name="menu_background">#FFFFFF</color>
 
 	<color name="spinner_border">#61000000</color> <!-- 38% Black -->
-	<color name="forum_discussion_nested_line">#cfd2d4</color>
 	<color name="forum_cell_highlight">#ffffff</color>
 </resources>
\ No newline at end of file

briar-android/src/main/res/values/styles.xml

@@ -102,7 +102,7 @@
 
 	<style name="DiscussionLevelIndicator">
 		<item name="android:layout_marginLeft">4dp</item>
-		<item name="android:background">@color/divider</item>
+		<item name="android:background">@color/thread_indicator</item>
 	</style>
 
 	<style name="BriarTabLayout" parent="Widget.Design.TabLayout">