Fixed various project warnings. Completely disabled nullability checks, went down from ~20k to 195.

Riot/Modules/Room/Members/RoomParticipantsViewController.m

@@ -102,6 +102,8 @@
     // Adjust Top and Bottom constraints to take into account potential navBar and tabBar.
     [NSLayoutConstraint deactivateConstraints:@[_searchBarTopConstraint]];
     
+    #pragma clang diagnostic push
+    #pragma clang diagnostic ignored "-Wdeprecated"
     _searchBarTopConstraint = [NSLayoutConstraint constraintWithItem:self.topLayoutGuide
                                                            attribute:NSLayoutAttributeBottom
                                                            relatedBy:NSLayoutRelationEqual
@@ -109,6 +111,7 @@
                                                            attribute:NSLayoutAttributeTop
                                                           multiplier:1.0f
                                                             constant:0.0f];
+    #pragma clang diagnostic pop
     
     [NSLayoutConstraint activateConstraints:@[_searchBarTopConstraint]];
     
@@ -850,7 +853,7 @@
     pendingMaskSpinnerView.alpha = 0;
     [UIView animateWithDuration:0.3 delay:0.3 options:UIViewAnimationOptionBeginFromCurrentState animations:^{
         
-        pendingMaskSpinnerView.alpha = 1;
+        self->pendingMaskSpinnerView.alpha = 1;
         
     } completion:^(BOOL finished) {
     }];