Add stress group to debug UI.

// FREEBIE

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -647,10 +647,6 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
     [self createScrollDownButton];
     [self createHeaderViews];
     [self addNotificationListeners];
-
-    dispatch_async(dispatch_get_main_queue(), ^{
-        [DebugUITableViewController presentDebugUIForThread:self.thread fromViewController:self];
-    });
 }
 
 - (void)registerCustomMessageNibs

Signal/src/ViewControllers/HomeViewController.m

@@ -273,13 +273,6 @@ typedef NS_ENUM(NSInteger, CellState) { kArchiveState, kInboxState };
     }
 
     [self updateBarButtonItems];
-
-    dispatch_async(dispatch_get_main_queue(), ^{
-        TSThread *thread = [self threadForIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
-        if (thread) {
-            [self presentThread:thread keyboardOnViewAppearing:NO callOnViewAppearing:NO];
-        }
-    });
 }
 
 - (void)updateBarButtonItems