Common swizzle for dealing with multiple plugins and Preferences on Mail in 10.13

MailTabViewController Swizzle

    -(void)MTsetSelectedTabViewItemIndex:(NSUInteger)idx{
    
          if ([[NSThread currentThread] threadDictionary][@"pluginExclusionLock"]){
              [swizzledSelf MTsetSelectedTabViewItemIndex:idx];
              return;
          }
          // grab the pluginExclusionLock
          [[NSThread currentThread] threadDictionary][@"pluginExclusionLock"] = @YES;
          [swizzledSelf MTsetSelectedTabViewItemIndex:idx];
          NSWindow * prefWindow = [self.tabView window];
          
          NSTabViewItem * newTabItem = [[self tabViewItems] objectAtIndex:idx];
          NSSize preferredSize = [newTabItem.viewController preferredContentSize];
          
          CGFloat toolbarWidth = 0.0f;
          for (NSView * aView in  [[[[prefWindow.toolbar valueForKey:@"_toolbarView"] subviews] firstObject] subviews]){
              toolbarWidth += aView.frame.size.width + 2.0;
          }
          preferredSize.width = MAX(preferredSize.width,toolbarWidth);
          
          if ( preferredSize.height>0 ){
              NSRect frame = [prefWindow frame];
              CGFloat height = preferredSize.height+TabItemHeight; // 78 for the height the tabs
              frame.origin.y = NSMaxY(frame)-height;
              frame.size.height = height;
              [prefWindow setFrame:frame display:NO];
          }
          
          // find and set width constraint on tabView;
    
          for (NSLayoutConstraint *constraint in [self.tabView constraints]){
              if (constraint.firstAttribute == NSLayoutAttributeWidth && constraint.relation == NSLayoutRelationEqual && constraint.secondItem==nil){
                  widthConstraint = constraint;
              }
          }
          if (!widthConstraint) {
                widthConstraint = [self.tabView.widthAnchor constraintEqualToConstant:bestWidth];
                widthConstraint.constant = bestWidth;
                widthConstraint.active = YES;
          }
            
          widthConstraint.constant =  preferredSize.width;
          [[NSThread currentThread] threadDictionary][@"pluginExclusionLock"] = nil;
    }