Fix wrong default "marked unread" value

This led to the suggested rooms for the current space section having an
marked as unread badge.

Change-Id: Ifcba015cfc740ceacb8ceeb5e85727aec7e55aae

vector/src/main/java/im/vector/app/features/home/room/list/SectionHeaderAdapter.kt

@@ -38,7 +38,7 @@ class SectionHeaderAdapter constructor(
             val isHidden: Boolean = true,
             // SC additions
             val unread: Int = 0,
-            val markedUnread: Boolean = true,
+            val markedUnread: Boolean = false,
 
             // This will be false until real data has been submitted once
             val isLoading: Boolean = true